Answers
Related Questions
Which of the following correctly describes what a mutation is?
A. A change in in the DNA code of an organism
B. A change to a gene of an organism
C.A change to the nucleotide sequence
D.All of the above
Answers
The answer is D, all of the above.
Thylacosmilus is a marsupial, and Smilodon is a mammal. Thylacosmilus and Smilodon both have saber teeth, but they do not share an ancestor that had saber teeth. What are saber teeth for these organisms?
A.analogous structures
B .homologous structures
C.vestigial structures
D.mutated structures
Answers
Answer:
Analogous structures
Explanation:
Analogous structures are characters that derived separately in two different species to achieve the same function. If the Thylacosmilus and Smilodon don't share an ancestor then saber teeth must be analogous
Answer:
The answer is A
Explanation:
What type of cell is created when a sperm fuses with an egg?
Answers
Answer:
Zygote
Explanation:
Why does an owl need a gizzard?
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Answer:
don’t even know
Explanation:
Answer:
The gizzard is an owl's second stomach. There are no digestive glands in the gizzard, and in birds of prey, it serves as a filter, holding back undigestible items such as bones, fur, teeth, and feathers. Some birds eat grit or small stones to aid with digestion.
Explanation:
The gizzard is an owl's second stomach. There are no digestive glands in the gizzard, and in birds of prey, it serves as a filter, holding back undigestible items such as bones, fur, teeth, and feathers. Some birds eat grit or small stones to aid with digestion.
the blood veins is
a.leaving the lungs.
b.moving in a single file
c.traveling to the heart.
Answers
C .-.
Which of the following is the best way to develop a dichotomous key? A Move from observing the most specific traits that can divide the organisms to the most obvious traits, offering 2 choices each time. B Move from observing the most obvious traits that can divide the organisms to the most specific traits, offering 2 choices each time. C Move from observing the most obvious traits that can divide the organisms to the most specific traits, offering 4 choices each time. D Move from observing the most specific traits that can divide the organisms to the most obvious traits, offering 4 choices each time.
Answers
Answer:
Move from observing the most specific traits that can divide the organisms to the most obvious traits, offering 2 choices each time
Explanation:
dichotomous key reffers to a tool that give room to the user in determining the identity of items in the natural world. Items can be mammals, fish,wildflowers, mammals and reptiles. The particular key is made up of series of choices that help user to get the name of a particular item correctly. At the end dichotomous keys always bring about two choices in a step.
In dichotomous key the user has to select a choice out which of the two statements that describes the unknown organism best, with the reference of the choice made based of moves to the next set of statements, so at the end the identity of the unknown is clarified.
Therefore, in dichotomous key it move from observing the most specific traits that can divide the organisms to the most obvious traits, offering 2 choices each time
The optimal development of a dichotomous key requires starting with general traits and progressing to specific ones, making two choices available at each step.
Explanation:The best way to develop a dichotomous key is to move from observing the most obvious traits that can divide the organisms to the most specific traits, offering 2 choices each time. This approach aligns with the principle of maximum parsimony, which suggests selecting the pathway with the fewest major events. By beginning with the most general traits, the dichotomous key can effectively narrow down to more specific characteristics, resulting in a logical and systematic classification or identification of species.
The best way to develop a dichotomous key is to move from observing the most obvious traits that can divide the organisms to the most specific traits, offering 2 choices each time. This approach allows for a systematic and logical progression in identifying and classifying organisms based on their traits. By starting with the most obvious traits, it helps narrow down the options and makes the key more user-friendly.
Your initial population has 40 rabbits. Five are born and and three die. Four immigrate into the population and two emigrate out. What is the change in population?
Answers
To calculate the change in the rabbit population, the births and immigrants are added, and the deaths and emigrants are subtracted, resulting in an increase of 4 rabbits.
Explanation:We can calculate the change in population of rabbits by considering births, deaths, immigration, and emigration. The initial population has 40 rabbits. Five rabbits are born, and three rabbits die. Additionally, four rabbits immigrate to and two emigrate from the population. So, the change in population is the sum of the births and immigrants minus the deaths and emigrants.
To calculate the population change: (5 births + 4 immigrants) - (3 deaths + 2 emigrants) = 9 - 5 = 4.
Therefore, the population has increased by 4 rabbits.
Final answer:
The change in rabbit population is an increase of 4 rabbits, after accounting for births, deaths, immigration, and emigration.
Explanation:
To calculate the change in population of rabbits, you need to account for births, deaths, immigration, and emigration.
Initial population: 40 rabbits
Births: +5 rabbits
Deaths: -3 rabbits
Immigration: +4 rabbits
Emigration: -2 rabbits
Now, let's calculate the change:
Add the number of births and immigration: 5 + 4 = 9 rabbits
Subtract the number of deaths and emigration: 3 + 2 = 5 rabbits
Calculate the net change: 9 rabbits (added) - 5 rabbits (removed) = 4 rabbits
The population change is an increase of 4 rabbits.
Which causes a drop in female hormone levels?
the onset of the menstrual flow
if an egg is released from the ovary
if the uterine wall thickens
if the egg is not fertilized
Answers
Answer
If the uterine wall thickens
Explanation:
A,B,D, these are all things that happen on a daily to women and most of them still have good horomone levels
When the egg is not fertilized that causes a drop in female hormone levels. So, the correct option is D.
What are Female hormones?Sexuality and fertility are influenced by the three primary reproductive hormones are estrogen, testosterone, and progesterone. Pregnancy, puberty, menstruation, menopause, sex drive, sperm production, and other processes are all controlled by them. These hormones are made in the testes in males and ovaries in females.
The ovaries release the main female sex hormones. The ovary releases female gametes or eggs during ovulation. Following the discharge of the eggs, the ovary forms a corpus luteum, which secretes progesterone and oestrogen to prepare the uterine lining for a prospective pregnancy. The level of female hormones decreases when the egg is not fertilized.
Therefore, the correct option is D.
Learn more about Female hormone here:
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explain using an example how a new species of organisms can evolve?
Answers
Answer:
New species form by speciation, in which an ancestral population splits into two or more genetically distinct descendant populations. Speciation involves reproductive isolation of groups within the original population and accumulation of genetic differences between the two groups
Hope it helps :)
Which maps is an example of a Mercator projection?
Answers
Answer:
1st option
Explanation: just finished it
The shortest day of the year in the northern hemisphere is
December 22
March 21
June 21
September 22
HURRY QUICK
Answers
Answer:
December 22nd
Explanation:
DNA:
A. Encodes then information needed for making proteins within the cell
B. Directs RNA to make lipids that are needed by the cel
C. Produces carbohydrates
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How might bird species A and B come into contact with DDT, a pesticide used by farmers?
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Answer:
By birds that ate or were in contact with plants that were sprayed with DDT .
Explanation:
Dichlorodiphenyltrichloroethane (DDT) is a versatile pesticide used in agriculture to combat insect plagues. DDT has been prohibited in many contries because this insecticide might cause health problems in humans, especially during fetal development.
what is the role of the central nervous system
Answers
Answer:
central nervous controls most functions of the body and mind. It consists of two parts: the brain and the spinal cord. The brain is the center of our thoughts, the interpreter of our external environment, and the origin of control over body movement.
Explanation:
.
What are the Different stages of stars life cycle
Answers
Answer:
The stages of most stars life in order are: A Protostar, Main Sequence, Red Giant B Protostar, Main Sequence, Red Dwarf C Main Sequence, Red Dwarf, Protostar D Red Giant, Main Sequence, Protostar E Nebula, Protostar, Red Dwarf. 2 What does a protostar have to do to become a star? A Nuclear fusion in its core. B Nuclear fission in its core.
Use the food web shown to answer the questions below. Each answer will be a number, not the name of the organism. If the questions are answered correctly, the numbers of each answer will reveal a 5-digit code ..
1. Which organism feeds on the largest variety of organisms?
2. Which organism is an omnivore?
3. Other than bees, which organism does the blue lizard obtain energy from ?
4. Which organism feeds on both rabbits and mice?
5. Which organism is a predator of mice and the prey of a red-tailed hawk?
Answers
Answer:
1. 7, the hawk eats the largest variety of organisms. We know this because the hawk has the most arrows pointing TOWARDS it.
2. 8, the mouse is an omnivore. It eats both plants (grass) and animals (caterpillars).
3. 2, the caterpillar.
4. 9, the bobcat.
5. 1, the snake.
Answer:
Not sure but the lizard is probably an omnivore
Explanation:
Please help!!
If two transparent materials cause light to bend at different angles, the two transparent materials MOST likely have different __________.
A)focal points
B)densities
C)transparencies
D)wavelengths
Answers
Answer:
Transparency is the ability to "see through"
Explanation:
The answer is densities,B. depending on the density of an object, which means less transparent, if the object has more density, means it is more solid and less transparent...
Explain, in complete sentences, how hybrid cars help each of the following problems.
1. Most conventional(regular)cars don’t get great gas mileage.
2. Electric car batteries need to be recharged constantly.
3. Conventional (regular) cars burn gas even when stopped
at a red light.
This is about hybrid cars please answer these 3 questions 29 POINTS!!
Answers
Final answer:
Hybrid cars help improve gas mileage, eliminate the constant need for battery recharging, and reduce fuel consumption when stopped at a red light.
Explanation:
Hybrid cars help each of the following problems in the following ways:
Most conventional cars don't get great gas mileage: Hybrid cars have better fuel economy compared to conventional cars, especially in stop-and-go traffic. They achieve this by using an electric motor and a small internal combustion engine coupled to a generator, which charges the onboard battery. Additionally, hybrid cars can utilize regenerative braking to generate electricity during braking, further improving fuel efficiency.
Electric car batteries need to be recharged constantly: Hybrid cars overcome the limited range of electric cars by using a small internal combustion engine to drive the electric motors and recharge the battery when needed. This eliminates the need for constant recharging and allows hybrid cars to travel longer distances without relying solely on electricity.
Conventional cars burn gas even when stopped at a red light: Hybrid cars have a feature called auto stop-start, which automatically shuts off the internal combustion engine when the vehicle is stopped or coasting. This helps save fuel and reduces emissions because the engine is not burning gas unnecessarily while idling.
what is a vertabrate
Answers
Answer: an animal of a large group distinguished by the possession of a backbone or spinal column, including mammals, birds, reptiles, amphibians, and fishes.
Explanation:
Answer:
my back! JK
Explanation:
a creature of an enormous gathering recognized by the ownership of a spine or spinal section, including warm blooded creatures, fowls, reptiles, creatures of land and water, and fishes.
Question 28 (1 point)
Which of the following is not a metric measure of volume?
O centimeters cubed
ograms
liters
amount of water in a baby bottle
Previous Page
Next Page
Answers
Final answer:
The option that is not a metric measure of volume is 'ograms,' as it is not a valid metric system unit. Centimeters cubed and liters are both metric measures of volume.
Explanation:
The student asks which of the following is not a metric measure of volume. The options given are centimeters cubed, ogams, liters, and the amount of water in a baby bottle. The metric measures of volume typically include units like liters, milliliters (mL), and cubic centimeters (cm³). These units are part of the International System of Units (SI units) used for volume measurements.
The correct answer is 'ograms' as this is not a valid measure of volume in the metric system. The option 'amount of water in a baby bottle' could refer to a metric volume if measured in liters or milliliters. Centimeters cubed (cm³) and liters are both standard metric units of volume. A milliliter is equivalent to one cubic centimeter, and thus these measurements can be used interchangeably for liquid volumes.
The Milky Way a section of the universe smaller in size than our solar system, true or false
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Answer:
The answer is false, because our solar system exists inside the Milky Way.
Explanation:
List and describe the evidence for the
plate tectonics theory.
Answers
Answer:
The shapes of continents fit together like a puzzle. The matching coastlines show where the continents broke apart. Identical rocks that formed over 200 million years ago have been found on different continents.
Explanation:
If I'm right help me out leave a five stars and like
In humans, the protein CFTR regulates the components of sweat, digestive fluids, and mucus. Humans can have a normal form of the gene or a mutated form. Which of the following would provide evidence that the mutated form of the CFTR protein is harmful to humans?
A. Both the normal and the mutated form of the CFTR gene can be found in healthy humans.
B. Healthy individuals, with the normal form of the CFTR gene, can pass on a mutated form.
C. Most illnesses have symptoms associated with sweat, digestive fluids, and mucus.
D. Individuals who inherit the mutated form of the gene usually develop serious health problems.
Answers
Answer: I think it’s b
Correct me if I am wrong
In humans, the protein CFTR regulates the components of sweat, digestive fluid and mucus. Humans normally have a normal form of CFTR protein.
Mutated form of CFTR protein is harmful. Individuals who inherit the mutated form of the gene usually develop serious health problems.
About CFTR proteinThe cystic fibrosis transmembrane conductance regulator (CFTR) protein is an ion channel protein.
CFTR regulates balance of sodium chloride and water in body surfaces like lungs.
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Moin took some soil and measured the concentration of nitrogenous compounds in it. He distributed the soil equally in two pots- P and Q which he placed in sunlight.
He planted 10 sunflower seeds in Pot P and allowed them to grow. He did not grow anything in the Pot Q.
After one month, he tested the concentration of nitrogenous compounds in both the pots.
What do you think was his observation?
Answers
Answer: The nitrogenous compounds in the Pot P will be depleted and the Nitrogenous compound in the Pot Q will have same amount of it.
Explanation:
Moin took soil and put into two pots. In one of the pot which he labelled P,planted sunflower seeds.
Whereas, the pot Q he left as it is with no plantation in it. The observation after few days will be that the level of nitrogen in the pot P will be less compared to the pot Q.
Nitrogen is one of the important micro nutrient which serves many important functions in the plant body. It is the main component of chlorophyll and is important in enzyme synthesis.
Hence, pot P will have its nitrogen consumed by the plant and pot Q will have nitrogen in its soil.
Explain why the father determines the sex of the child:
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Answer:
the father's the one because he's the only one with the y chromosome hence if the sperm containing the y chromosome fertilises the ovum then the kid is a boy and if its the one with the x chromosome then its a girl
Answer:
In the XY sex-determination system, the female-provided ovum contributes an X chromosome and the male-provided sperm contributes either an X chromosome or a Y chromosome, resulting in female (XX) or male (XY) offspring, respectively. Hormone levels in the male parent affect the sex ratio of sperm in humans.
Explanation:
Hope this helps!!!!
Forever friend and helper,
Cammie:)
What is unique about a simulation that is not necessarily true about all models?
Answers
Answer:
Explanation:
Simulation is imitating a process. It is doing exactly like a system will do. It can be used in technologies, education, health, training,
safety engineering. Simulation can be used when the original or exact system is not in place, or cannot be accessed.
A model is a process that helps to understands a system. A model is like an example to follow in achieving a result. A model may not be followed judiciously such that you may require an aspect of the model and then use but not necessarily all attributes while a simulation does exactly what the system does.
Answer this question and I’ll email you some gucci trust
Answers
Answer:
A. Carries copies of instructions to make proteins from the DNA to the rest of the cell.
Explanation:
Messenger RNA (mRNA), molecule in cells that carries codes from the DNA in the nucleus to the sites of protein synthesis in the cytoplasm (the ribosomes).
Answer:
Haha jokester and the answer is A
Explanation:
mouth, pharynx, esophagus, stomach, _______
Answers
Answer:
mouth, pharynx, esophagus, stomach, Small Intestine.
Large Intestine.
Rectum.
Accessory digestive organs: liver, gallbladder, pancreas.
(PLASE HURRY)Which phrase describes estuaries? are made of fresh water only / are areas where rivers flow into lakes/ are homes to unique plants and animals/ are places where all of Virginia’s water drains
Answers
Final answer:
Estuaries are biomes where fresh water from rivers meets the ocean, resulting in brackish water that is home to unique plants and animals, with salinity influencing the organisms' adaptations.
Explanation:
The phrase that best describes estuaries is that they are homes to unique plants and animals. Estuaries are biomes where a river meets the ocean, creating an area where both fresh water and salt water mix, resulting in brackish water. This environment forms protected areas that are crucial for the life cycles of many organisms, including the spawning and development of young sea creatures like crustaceans, mollusks, and fish. The salinity in estuaries is a significant factor that influences both the types of organisms found there and their adaptations to the changing environment. High and low tides bring about changes in the salt water content of estuaries, contributing to their unique biodiversity.
The majority of people in United States work in the___industry A agriculture B fishing C mining D service
Answers
Answer:
D. service
Explanation:
Most people in the US work in jobs that require providing a service to others, whether it's at a restaurant, a department store, a school, etc. Yet, those who work in specialised jobs like agriculture, fishing, and mining are more rare because they need to live in a certain area that is optimal for such positions.
Thus, the answer is D.
Answer:
D service
Explanation:
In terms of jobs, the most popular sector in America is service sector. These include accountants, teachers, etc.