During the second trimester, the fetal reproductive system matures, the fetus becomes more active, and the placenta fully supports nutrition and waste elimination.
Explanation:During the second trimester of fetal development, several significant changes occur. The fetus grows to about 30 cm, becomes active, and the mother usually feels the first movements. All organs and structures continue to develop.
Importantly, the placenta has fully taken over the functions of nutrition and waste elimination and has begun the production of estrogen and progesterone, as the corpus luteum has degenerated by this stage. The placenta's importance is heightened during the second trimester, as it will continue to function up through the delivery of the baby. Therefore, the correct answer to the question is D. The fetal reproductive system matures.
Final answer:
During the second trimester, the fetus continues to grow, reaching about 30 cm, and becomes more active. The placenta, already developed, handles nutrition, waste elimination, and hormone production. Organ and structural development is ongoing, including that of the reproductive system. Option A,B, D.
Explanation:
During the second trimester of fetal development, the fetus experiences significant growth and changes. According to provided references, by the end of the second trimester, the fetus has grown to about 30 cm (12 inches) and becomes more active, with movements being felt by the mother. The development of all organs and structures continues, with the placenta already established and taking over various functions such as nutrition, waste elimination, and the production of hormones like estrogen and progesterone from the degenerated corpus luteum. The placenta maintains these functions until the delivery of the baby. Regarding the provided choices, respiratory system changes do occur, and while the fetus makes breathing movements, rhythmic fetal breathing is not established due to dependence on the mother for oxygen. The placenta is fully developed early on and does not just start to develop during the second trimester. Fetal weight shifting to half of what it will be at birth, typically occurs later in pregnancy. The maturation of the fetal reproductive system also continues to develop throughout the second trimester.
The Palo Duro Canyon in the High Plains was originally formed by a fork in the Red River. The canyon continues to widen and deepen due to A) human interactions. B) wind and water erosion. C) overgrazing of the land. D) physical and chemical weatherin
Answer:
d
Explanation:
Answer:
B
Explanation:
Wind and water move the rocks pieces and make the canyon longer and deeper. Hope this was helpful!
Which genetic technology is shown in the diagram?
A). Cloning
B). Genetic Engineering
C). Selective Breeding
Answer:
B. Genetic Engineering
Explanation:
The genetic technology is shown in the diagram is Genetic Engineering.
What is genetic engineering?Genetic engineering is the manipulation and recombination techniques of genes, through a set of scientific knowledge (genetics, molecular biology, biochemistry, among others), which reformulate, reconstitute, reproduce and even create living beings.
In this case we are dealing with a DNA that we will cut a part of it and transform it into a new part, so the genetic engineering is used.
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All of the following except this are examples of mass movement: creep, rock falls, landslides, ice wedging
Answer:
Ice wedging
Explanation:
Landslides, rock falls, and creeps are all mass movements, but wedging is not a movement of land, meaning that that is the answer.
Explain what you believe may have happened to the ecosystem in year 6 from the Ecosystem Study graph above.
Based on the graph, the number of organisms in the ecosystem decreased in year 6.
What are the factors?This could be due to a number of factors, such as:
A natural disaster, such as a flood or fire, that killed or displaced many organisms.A change in the environment, such as a change in temperature or precipitation, that made the ecosystem less suitable for the organisms that lived there.The introduction of a new predator or competitor that preyed on or outcompeted the native organisms.The overexploitation of the ecosystem by humans, such as overfishing or overhunting.Find out more on ecosystem here: https://brainly.com/question/842527
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Notice that the appendages of the organisms in the picture contain an overall common structure but different functions. What is the best explanation on why these organisms share a common structure in number and organization of bones?
Answer:
The answer is B
Explanation:
I did USATESTPREP :)
Why do people who exercise need more calories than people who don't exercise?
People who exercise need more calories because physical activity increases their energy expenditure. Exercise burns calories during the activity and raises the basal metabolic rate (BMR), resulting in a higher overall calorie requirement. Athletes, in particular, have increased energy needs due to the intensity and frequency of their exercise.
Explanation:When you exercise, your body requires more energy to support the physical activity. This increased energy requirement is met by burning calories. When you burn calories, you are using stored energy from your body, particularly from fat reserves. Therefore, people who exercise need more calories to replenish the energy they have expended during physical activity.
Exercise not only burns calories during the activity itself but also increases your basal metabolic rate (BMR). BMR is the number of calories your body needs to perform its basic functions, such as breathing and circulating blood, while at rest. When you exercise regularly, your BMR increases, leading to a higher overall calorie requirement.
For example, a competitive athlete may need 3,000 to over 5,000 calories daily, compared to a sedentary individual who needs about 2,000 calories per day. The energy needs of athletes are influenced by factors such as the intensity, duration, and frequency of their exercise, as well as their gender, age, and weight.
White (W) hair in goats is caused by the dominant gene while black (w) hair is recessive. A
heterozygous white male is crossed with another heterozygous white female. What are the
genotypic and phenotypic ratios of their offspring?
In this cross between two heterozygous white goats (Ww x Ww), the genotypic ratio of the offspring will be 1:2:1 (WW:Ww:ww), and the phenotypic ratio will be 3 white : 1 black.
Explanation:In this question, we have a cross between two heterozygous white goats, where white color is determined by the dominant gene (W) and black color is determined by the recessive gene (w). The genotypic ratio of their offspring can be predicted using a Punnett square. When we cross two heterozygous goats (Ww x Ww), the possible genotypes of their offspring include WW (white), Ww (white), and ww (black).
Therefore, the genotypic ratio is 1:2:1, with one white homozygous dominant (WW), two white heterozygous (Ww), and one black homozygous recessive (ww) genotype.
The phenotypic ratio represents the physical appearance of the offspring. Since the white color is dominant over black, all the goats with either WW or Ww genotypes will have white hair. This means that the phenotypic ratio is 3 white : 1 black.
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A chicken with black feathers (BB) is crossed with a chicken with white feathers (WW). The offspring have black and white feathers.
What is the genotype of the offspring?Explain incomplete dominance, using snapdragon flowers as an example.
Answer:
The genotype is BW
Explanation:
Meri Marzo. That is a codominance, where 2 traits are being expressed or shown in an offspring. If black chicken and the white chicken are crossed, there is 100% of probability that they will have an erminette type of chick.
A chicken with black feathers (BB) is crossed with a chicken with white feathers (WW). The offspring have black and white feathers.
What is the genotype of the offspring?
1.) BW
2.) BW
3.) BW
4.) BW
This is ✔ codominance because there are two ✔ dominant traits.
What is the genotype of the offspring? Explain incomplete dominance, using snapdragon flowers as an example.
Sample response:
Incomplete dominance is seen in offspring that have a third phenotype not seen in the parents. Snapdragons are an example. The third phenotype results when a snapdragon with the red pigment protein crosses with a snapdragon with a defective gene that produces no pigment, resulting in a white snapdragon. The offspring receive one allele from each parent, resulting in half the amount of pigmentation for red color being expressed. The offspring will be pink snapdragons instead of red or white.
what percentage of the total earth population growth is undeveloped countries
Answer:
Explanation:
The less developed countries of Africa, Asia, and Latin America now account for 80 percent of world population, but represent 99 percent of global growth.
Answer:
97
Explanation:
13. Which components of DNA are held together by weak hydrogen bonds?
A) phosphate and adenine
B) phosphate and deoxyribose
C) thymine and deoxyribose
D) cytosine and guanine
Answer:
D
Explanation:
Cytosine and Guanine
Cytosine and guanine are held together by weak hydrogen bonds. Therefore, option (D) is correct.
What is hydrogen bond?A hydrogen bond is a type of weak chemical bond that occurs between a hydrogen atom covalently bonded to a highly electronegative atom, such as oxygen or nitrogen, and another electronegative atom in a nearby molecule. Hydrogen bonds are responsible for many important biological processes, such as the structure of DNA, the folding of proteins, and the properties of water. They are much weaker than covalent bonds, but they play important roles in the structure and function of molecules.
The nitrogenous bases, cytosine and guanine, are held together by three weak hydrogen bonds to form a base pair in DNA.
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what other systems/organs work with the circulatory system?
Skeletal System
Digestive System
Nervous System
Excretory System
Answer:
Nervous and Digestive System
Explanation:
Edward planted some potatoes in his backyard. How will his potato plants get energy needed to grow?
A)
From the water in the soil
B)
By relying on other consumers
They change sunlight to sugar.
D)
From fertilizer added to the soil
Answer:
c:they change sunlight to suger
Explanation:
Answer:
C) They change sunlight to sugar.
Explanation:
They change sunlight to sugar, with water and carbon dioxide present in the environment. This is called photosynthesis. Plants are producers.
Which of the following is a global economic issue?
O
A. The leader of a profitable company has retired.
O
B. One country has more tourism than another.
O
C. Many countries are increasing their use of fossil fuels.
O
D. One business has lost profits since last year.
Many countries are increasing the use of fossil fuels is a global economic issue. Therefore, option “C” is correct.
What are global economic issues?
Economic issues are being faced globally and are under multiple crises. The multiple crises are inflation, climate change, the European war, and the disrupted supply chain after the pandemic.
After the pandemic, the economic outlook has changed because of the disruption in the supply chain around the globe. As a result, the gross production growth rate has declined.
The high inflation rate has affected both developed as well as developing countries. This increasing challenge has raised the risk for developing countries by weak investment and debt servicing burden.
Hence, Global economic issues require to be addressed by leaders of the developed nation.
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Which structure connects each kidney to the bladder?
Ureter
Urethra
Answer:
Two ureters.
These narrow tubes carry urine from the kidneys to the bladder. Muscles in the ureter walls continually tighten and relax forcing urine downward, away from the kidneys. If urine backs up, or is allowed to stand still, a kidney infection can develop.
Explanation:
The ureter connects each kidney to the bladder, forming part of the urinary system, along with the kidneys, bladder, and urethra.
Explanation:The structure that connects each kidney to the bladder is the ureter. The ureters are two muscular tubes that transport urine from the kidneys to the bladder. Each kidney has one ureter, which channels the urine downwards to the bladder under the force of gravity and muscle contractions. This is part of the urinary system, which also includes the kidneys, bladder, and urethra, but the urethra's role is to expel urine from the body, not to connect the kidneys and the bladder.
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In the above plant cell, what is the name of the cellular organelle labeled with the letter X?
A -chloroplast
B-cell wall
C-nucleus
D- vacuole
The question pertains to identifying a cellular organelle in a plant cell. The possibilities are chloroplast, cell wall, nucleus, or vacuole, each of which has distinct roles in the cell. The correct answer depends on the specific diagram provided in the question.
Explanation:Without seeing the actual diagram, it's quite difficult to accurately identify the cellular organelle labeled with the letter X. However, based on the options provided, the four possible answers are: (A) chloroplast, (B) cell wall, (C) nucleus, and (D) vacuole. All of these are essential cellular organelles in a plant cell. The chloroplast is responsible for photosynthesis. The cell wall provides structure and support. The nucleus acts as the control center, containing DNA. The vacuole stores water and other substances. Please refer back to your diagram to accurately identify the organelle labeled as X.
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The correct answer is option A. In the plant cell the cellular organelle labeled with the letter X is chloroplast.
Option A is correct because chloroplasts are commonly labeled in diagrams of plant cells and are crucial for photosynthesis. They are identifiable by their green color and internal thylakoid membranes.
Why other options are incorrect:
Option B is incorrect because. The cell wall is an outer layer and usually not labeled as a specific organelle but rather a structure surrounding the cell.Option C is incorrect because. The nucleus is typically a distinct, central structure in the cell, often larger and centrally located, and is not usually labeled with the letter X.Option D is incorrect because. The vacuole is a large, central organelle involved in storage and maintaining cell turgor, and is usually labeled as such due to its distinct size and central location.Read the passage. What is the claim?
Exercise and diet help people lose more weight than with the aid of this drug.
This drug helps people lose more weight than diet and exercise alone.
Overweight adults have always had high blood pressure.
This drug won’t help people lower their blood pressure if they already exercise.
Answer:
Hello There. the Correct answer to this is This drug helps people lose more weight than diet and exercise alone. The reason for this statement is that with diet and exercise alone, 23% lost weight whereas with diet, exercise and the drug, 48% lost weight so the conclusion is that the drug enhanced weight loss. As a personal comment, the trouble with synthetic drugs is that there are usually side effects so that avoiding the drugs also avoids side effects so therefore I think it is best to find the right diet and exercise that actually lowers weight or take a vitamin or herb supplement to help with this.
Hope it helps!
From ItsNobody
the drug helps people lose more weight than diet and exercise alone because with diet and exercise alone, the body will lose 23% of weight whereas with diet, exercise and the drug, the body will loose 48% of weight so the conclusion is that the drug enhanced weight loss.
what are the different types of drug ?
A drug is defined as any chemical substance which brings about changes of living organisms, the science that deals with drugs in medicines and their mechanism of action, physical and chemical properties, metabolism toxicity and therapeutics called as pharmacology.
Principles of drug action and different types of drugs are used in the treatment and prevention of diseases in human beings
Drugs can be classified based upon their effects which include stimulants, depressants, hallucinogens, dissociative, opioids, inhalants and cannabis.
Drugs can act as Stimulants which speed up the activity of nervous system, as Depressants which slow down the nervous system, Opioids can create a sense of euphoria and are habit-forming, Hallucinogens and dissociative which can change a person’s perception of reality.
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PLZ HELP, HURRY! IM GIVING 100 POINTS AND BRAINLIEST!!
How do genetic factors influence the formation of "dead zones” around creosote bushes?
Oh, and plz don't give me the sample response from edg.
plz and thx
Answer:
Genetic factors contributes to the formation of the dead zones is by their ability to expand their abilities that enables them to spread and contribute to the formation of the dead zones. These dead zones are made when the oxygen are low where it is necessarily important for the aquatic life, if the oxygen needed is depleted or too low, instead of supporting aquatic life, dead zones are created and factors contribute to these occurrences with their ability to expand.
The Law of Segregation states that every organism possesses a pair of, , or different versions of a gene, for a trait and that each parent passes a copy of only one of these to its offspring
Answer:
alleles is your answer
Explanation:
plz ask if you want clarification!
The branch of science which deals with the study of genes and inheritance is called genetics.
The correct answer is allele.
The law of segregation is defined as the separation of the gene pair which is an allele during the time of gamete formation to pass on to the next generation.
According to this law, the allele is the thing that separates from the pair.
Hence, the correct answer is allele.
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A humidifier is a device that adds moisture to dry air. Which part of the human respiratory system has the same function? *
HELP ASAP
A humidifier is a device that adds moisture to dry air, and the parts of the human respiratory system that have the same function are the nose and the throat, as they have the mucous membrane that makes the dry air wet.
What is the significance of inhaling wet air?The mucous membranes of the nose and throat aid in the inhalation of wet air because dry air from the environment can harm the lungs' alveoli, it is wetted before reaching the alveoli with the help of air from the nose. The wet air is helpful for the lungs, which are involved in the oxygenation process and supply oxygen to the body parts.
Therefore, a humidifier is a device that adds moisture to dry air, and the parts of the human respiratory system that have the same function are the nose and the throat, as they have the mucous membrane that makes the dry air wet.
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Final answer:
In the human respiratory system, the nasal cavity functions similarly to a humidifier by warming and humidifying air as it passes through, thus helping to protect the respiratory tract.
Explanation:
A humidifier adds moisture to dry air, which can be particularly soothing for someone with a respiratory system infection, like bronchitis. In the human respiratory system, the nasal cavity performs a similar function. As air passes through the nasal cavity, it is warmed and humidified by the moisture from mucous membranes. This air modification protects the respiratory tract by sealing the tissues from direct contact with air and prevents potential damage from cold, dry air. Furthermore, the mucus in the respiratory tract, which is high in water content, helps to humidify and pick up water as air crosses these mucous surfaces, ensuring the air equilibrates to body conditions.
What is a limitation of Jillian's cell model?
Jillian made a model of an animal cell. She used a round
balloon to represent the cell membrane She pushed
objects like marbles and rocks into the balloon to show cell
parts, then filled it with water to show fluid inside the cell
It does not make up the tissues of a living thing,
It does not show the functions of the cell parts,
It is larger than a real animal cell,
It is more complex than a real animal cell.
Answer:
It does not show the functions of the cell parts.
Explanation:
One limitation of Jillian's cell model is that it does not show the functions of the cell parts.
What is Jillian's cell model?Jillian's cell model is a model of an animal cell that was created using a round balloon to represent the cell membrane and objects such as marbles and rocks to represent cell parts. The model was then filled with water to show the fluid inside the cell. This model was likely created as a teaching aid or for educational purposes.
Some limitations of this model include:
It does not make up the tissues of a living thingIt does not show the functions of the cell partsIt is larger than a real animal cellIt is more complex than a real animal cellLearn more about Jillian's cell model, here:
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How are Skylab and Salyut similar?
They are both space stations
They were both missions to the moon,
They were both built during the mid-1980s.
They are both types of liquid-propelled rockets
Answer:
they are both space stations
Explanation:
trust me it's correct (: !
what percentage of birds with the most common beak depth in 1976 survived the drought?
To determine the percentage of birds with the most common beak depth in 1976 that survived the drought, the number of birds with the common beak depth before and after the drought needs to be compared.
Explanation:The percentage of birds with the most common beak depth in 1976 that survived the drought can be determined by analyzing data from that time period. By comparing the number of birds with the most common beak depth before and after the drought, we can calculate the percentage of survival. For example, if there were 100 birds with the most common beak depth in 1976 and only 30 survived the drought, the percentage of survival would be 30%.
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Summary of Newton’s 3 laws
Newton's laws of motion are three physical laws that, together, laid the foundation for classical mechanics. They describe the relationship between a body and the forces acting upon it, and its motion in response to those forces. Newton's first law states that every object will remain at rest or in uniform motion in a straight line unless compelled to change its state by the action of an external force.The third law states that for every action (force) in nature there is an equal and opposite reaction.
Final answer:
Newton's three laws of motion describe how objects behave when forces act upon them. The first law states that objects at rest stay at rest and objects in motion continue in motion unless acted upon by an outside force. The second law relates force, mass, and acceleration. The third law states that for every action, there is an equal and opposite reaction.
Explanation:
Newtons's First Law:
Newton's first law states that every object will continue to be in a state of rest or move at a constant speed in a straight line unless it is compelled to change by an outside force. For example, if a book is sitting on a table, it will remain at rest until a force, such as someone pushing it, is applied to make it move.
Newton's Second Law:
Newton's second law states that the change of motion of a body is proportional to and in the direction of the force acting on it. This means that when a force is applied to an object, its acceleration is directly proportional to the force and inversely proportional to its mass. For example, if you push a small toy car with a large force, it will accelerate quickly because the mass of the car is small.
Newton's Third Law:
Newton's third law states that for every action, there is an equal and opposite reaction. This means that when one object exerts a force on another object, the second object exerts a force of equal magnitude but in the opposite direction on the first object. For example, when you push against a wall, the wall pushes back with an equal force, keeping you from falling through it.
When cold air moves into a region occupied by warm air violent weather may occur such as heavy downpours and gusty winds. What type of front can cause these violent weather conditions? *
A) Cold front
B) Warm front
C) Stationary front
D) Occluded front
PLEASE HELP!!!!!!!!!!
What does the word hypothesis mean?
a statement making a prediction that is testable by experiment
a question that a scientist wishes to answer about a problem
a belief that some but not all scientists share
a theory that is widely accepted by the majority of scientists
Hypothesis is a statement making a prediction that is testable by experiment. Usually follows an if then because format.
The mossing demand for meat in a state led to Intensive farming of livestock. Intensive livestock farming increased the concentration of
methane in the atmosphere and caused severe environmental problems. Methane is which type of gas and what type of endironmental problem
will methane cause?
Wethane sai
gas. Excess of methane in the atmosphere will lead to
Answer:
Explanation:
When animals pass out feaces or pics they release Methane gases.
Methane is an example of green house gases which when accumulated in the atmosphere leads to global warming.
Methane Captures radiation from sun leading emission of green houses gases into the environment.
The pose a lot of threat to life as the ozone layer gets depleted and human are more exposed to direct radiations from aunt light.
Meghan gases are more potent that carbon dioxide.
Answer:
green house gases and global warming
What is the Schwarzschild radius?
The Schwarzschild radius is the critical radius at which the escape velocity equals the speed of light, defining the boundary beyond which nothing, not even light, can escape the gravitational pull of a non-rotating black hole. Mathematically expressed as [tex]\( Rs = \frac{2GM}{c^2} \)[/tex], it plays a key role in astrophysics, marking the threshold for gravitational collapse to form black holes.
The Schwarzschild radius is a characteristic radius associated with a non-rotating black hole, named after Karl Schwarzschild, who first solved Einstein's field equations to describe the gravitational field around a point mass. It represents the radius at which the escape velocity equals the speed of light.
Mathematically, the Schwarzschild radius (Rs) is given by the formula:
[tex]\[ Rs = \frac{2GM}{c^2} \][/tex]
where:
- ( G ) is the gravitational constant,
- ( M ) is the mass of the object (in this case, a black hole),
- ( c ) is the speed of light in a vacuum.
When an object, such as a massive star, collapses within its Schwarzschild radius, it forms a black hole. At this point, the escape velocity required to leave the gravitational influence of the object exceeds the speed of light, making escape impossible according to the laws of physics as we understand them.
Understanding the Schwarzschild radius is crucial in astrophysics for predicting when a star might undergo gravitational collapse to form a black hole.
The potential extinction of the Whooping crane appears to be diminishing.
True
False
Answer:
True
Explanation:
Whooping Crane of North America are one of the most endangered species and in order to save them a recovery program was launched by the Canadian and American in 1967.
After the successful implementation of this recovery program, the number of crane birds started increasing. At present there are 15 species of cranes in the world. However, still the program needs to be continues for several years till the population of Cranes reach a safer level.
Hence, the given statement is true
PLEASE HELP WHOEVER COMES FIRST I WILL MARK BRAINLIEST!!
Identify how the plant crops must have obtained the following necessities for growth.
a) source of carbon for making sugars in photosynthesis
b) source of water for photosynthesis
c) source of energy for photosynthesis
d) source of nitrogen for synthesizing proteins
e) source of phosphorus for synthesizing phospholipids, ATP, DNA and RNA
f) source of oxygen for cellular respiration
Answer:
i would say b and e
Explanation:
How do astronomers find exoplanets?
They can see them using Earth-based optical telescopes.
They look in areas that have the fewest stars.
They measure how much gravity they have.
They measure the shift in a star's emission spectrum.
Answer:
They measure the shift in a star's emission spectrum.
Explanation:
Exoplanets are planets found outside the solar system.
Planets orbiting far enough from stars to be resolved reflect very little starlight, so planets are detected through their thermal emission instead. These thermal emission is gotten by observing the shift in the stars emission spectrum.
Coronagraphs are also used to block light from the star which results to leaving the planet visible. Direct imaging of an Earth-like exoplanet requires extreme use of optothermal stability.
They can also be found by using space based telescopes.
Answer:
They measure the shift in a star's emission spectrum.Explanation: