Answer:
Following are the limitations of the modern periodic table:
In the modern periodic table, the exact position of the element, hydrogen, has yet not been decided. Another drawback of the modern periodic table is that the lanthanides and actinides series are not located in the main body of the periodic table.Many elements have different isotopes. There is no location for adding the isotopes in the periodic table.
A major function of a plant's roots is to...???
A major function of the roots of a plant is to absorb water to produce food for the organism. They need water to produce the glucose product of food, the other reactant is carbon dioxide. This is the process of photosynthesis. The other product is oxygen
- Oxygen, substance all organisms require to survive.
- Glucose, substance produced and used by plant organisms for food.
- Reactant, substances used to make products.
- Carbon Dioxide, gas found floating in air, used by plants to make oxygen.
- Photosynthesis, the process where plants use their chlorophyll to make substances like food
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stem cells are considered pluripotent true or false?
Answer:
False
Explanation:
Answer:
The answer is TRUE! Not fasle. Just did the exam for summer school.Another name for a difficult birth is
A: dysplasia
B: dystopia
C: dystocia
D: dyskinesia
Answer:
C, Dystocia
Explanation:
Definition of Dystocia - difficult birth, typically caused by a large or awkwardly positioned fetus, by smallness of the maternal pelvis, or by failure of the uterus and cervix to contract and expand normally.
When a plant is not watered, it dies because it cannot ________.
Answer:it cannot perspirate.
Explanation:
Plant need water to survive. It needs water to dissolve the nutrient in the soil, and transport it from around its leaves through its stem cells...
7. In this unit, we learned about severe weather disasters and their repercussions. According to Murphy, explain how reducing the initial emergency response by one day can reduce the overall recovery by 1000 days? (40 points)
Swift emergency responses to severe weather disasters effectively reduce recovery time. The quicker issues are addressed, the quicker they can be resolved, leading to faster post-disaster recovery. Thus, reducing initial response time by a day can shorten the recovery period by up to a thousand days.
Explanation:The student's question involves understanding how reducing the initial emergency response can significantly reduce the overall recovery time in the context of severe weather disasters. The primary consideration is the concept of preparedness and prompt emergency action. A lack of preparedness or delayed action can exacerbate the consequences of severe weather disasters, as can be seen in instances like the Texas power grid crash.
Based on Murphy's work, reducing the initial emergency response time by one day can significantly speed up recovery. This is because a quicker response can prevent issues from escalating. For example, quicker responses can help in faster resource allocation, reduction of infrastructure damage, and can prevent humanitarian crises. These factors, if promptly addressed, avoid the accumulation of problems that would take an extended period to recover from.
In summary, the relationship between emergency response and recovery time is almost directly proportional. The faster governments and agencies respond to crisis situations, the quicker communities can bounce back and return to normal.
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What are some other ways that the reaction rate of the cooking food can be increased? Explain your answers.
Answer:
you could add an enzyme to speed up the reaction time and lower the amount of energy needed for the reaction
Hector used a conversion table to make calculations in a study of ocean evaporation relative to illuminance (light intensity). What
was the table for?
to find locations for his study
to work out details such as what equipment to use
to convert scientific terms such as evaporation and illuminance
O to convert English measurements into metric ones
Answer:
The conversion table was used to convert English measurements into metric ones.
Explanation:
The metric system (International System of Units) is the most common system that is recognized internationally for the measurements of mass, length, temperature, time, electric current, luminous intensity etc. This system includes the kilogram (mass), ampere (electric current), second (time), meter (distance or length) etc.
English System of Measurement ( imperial system) is the measurement system defined in the British Weights and Measures Act of 1824, and used across the British Empire earlier. This system includes units such as gallons, feet, miles, pounds etc.
The Milky Way is held together by a black hole's gravitational force. Since the stars near this black hole move at a high speed, what can you
infer about the black hole?
A. Its location
B. Its size
C. Its depth
D. Its speed
The high speed of stars near the Milky Way's central black hole suggests that it has a large mass, specifically around 4 million solar masses, which significantly affects their orbital velocity and the dynamics of the galaxy.
Explanation:Given the high speed of stars near the black hole at the center of the Milky Way, we can infer that the black hole has a very large mass. The mass of the black hole has been estimated at about 4 million solar masses, based on the orbital dynamics of nearby stars. These stars move at significant velocities, which is a direct consequence of the black hole's gravitational force. According to the observations from radio telescopes and the application of Kepler's third law, all of this mass is confined within a region smaller than the orbit of Mercury, which signifies that the black hole is both incredibly dense and massive.
This concentration of mass creates a gravitational pull that influences the stars and other matter in its vicinity, leading to high orbital speeds. Such a supermassive black hole holds galaxies like our Milky Way together and plays a fundamental role in their dynamics. In this case, we can conclude that the correct answer is B. Its size, meaning the mass of the black hole, since 'size' in this context refers to mass rather than physical dimensions like volume or diameter.
The voyage of the HMS challenger was important because
Answer:
HMS Challenger is an expedition that happened in the 19th century. With this expedition, modern oceanography began.
Explanation:
This expedition answered many questions regarding the sea world. It was organized especially for collecting data about the ocean world, like the temperature of the water, currents, ocean life, etc.
HMC challenger helped to discover more than 4000 unknown species.
Which of the characteristics of life is displayed by the following statement: "When you step out into the cold, your body shivers in order to keep its temperature at 98.6F." Question 7 options: All living things maintain homeostasis. All living things contain cells. All living things grow.
Answer:
The answer is "All living things maintain homeostasis." Homeostasis is the process of maintaining equilibrium and balance in the body in relation to the various cellular processes.
Explanation:
There are 7 characteristics of life:
A body should grow and change.A body should react to the external environment.It should have the capacity to reproduce.A body should be made up of cells.A body should be capable of passing traits to its offspring.It should have a metabolic system and should be able to breathe.It should have the capacity to maintain homeostasis.Homeostasis is responsible for the maintenance of variables like core temperature, glucose, iron level, oxygen level,pH, cerebrospinal fluid, etc. Humans and mammals regulate their temperature through allostasis. In case of extreme cold, the blood supply to the body is reduced through vasoconstriction. In case of high temperature, the sweat glands are activated which allow the body to cool down.
The characteristic of life displayed by the statement "When you step out into the cold, your body shivers in order to keep its temperature at 98.6F" is all living things maintain homeostasis. Correct Option is 1.
Homeostasis refers to the ability of living organisms to regulate and maintain a stable internal environment despite changes in the external environment. In the given statement, the body's response of shivering to maintain its temperature at a specific level (98.6°F) demonstrates the process of homeostasis. Shivering is a physiological response that generates heat and helps to counteract the cooling effect of the cold external environment, thereby maintaining the body's internal temperature within a narrow range. This is a vital characteristic of living organisms to ensure their proper functioning and survival.
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14. What is the primary purpose of cellular respiration? a. To use sunlight to produse food molecules b. To release energy from food molecules c. To remove carbon dioxide from an organism d. To bring oxygen into an organism
Answer:
The primary purpose of cellular respiration is to release energy from food molecules.
Explanation:
All organisms obtain the energy for their functioning, from the food they consume. Cells in the body of the organisms produce this energy by converting the energy stored in the food nutrients into a more usable form called adenosine triphosphate (ATP), which will release energy when the need arise. This process is known as cellular respiration. Some prokaryotic organisms use anaerobic respiration (oxygen not required), while others use aerobic respiration (oxygen-requiring) for energy production. In aerobic respiration, ATP is produced by the breaking down of glucose and oxygen into carbon dioxide and water. Mitochondria in the eukaryotic cells are responsible for this process, so they are called the powerhouses of the cell.
In a living organism, the food and nutrient get broken into smaller molecules that produce energy for the cell functioning by the process of cellular respiration.
The correct answer is:
Option b. To release energy from food molecules.
This can be explained as:
The organism consumes food to gain energy from different sources. This food gets processed and broken into molecules to release energy.The energy stored in the food molecules is converted to usable form by the cell called ATP.In the presence of oxygen, glucose breaks into the water, carbon dioxide and ATP molecules.The process of cellular respiration occurs in the mitochondria of the cell.Therefore, cellular respiration is a process in which energy is released from the food molecules.
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which of the following statements is true?
a. prokaryotes divide by mitosis
b. animal cells form new cell walls when they divide
c. eukaryotes have circular chromosomes
d. cytokines differs in plant cells and animal cells
Answer:
D. cytokines differs in plant cells and animal cells
Explanation:
A. is false, as prokaryotes to not divide by mitosis. They divide by binary fission.
B. is false. Animal Cells do not have cell walls. Prokaryote and Plant cells have cell walls. Animal Cells have plasma membranes.
C. is also false. Eukaryotes have line-like chromosomes. Prokaryotes have a single circular chromosome.
D. IS true. Cytokinesis differs in plant cells from animal cells. This is mainly due to the cell wall in the plant cell.
The statement that cytokinesis differs in plant and animal cells is true, as plants form a cell plate and animals use a cleavage furrow. Other statements related to cell division in prokaryotes are incorrect as they divide by binary fission, not mitosis.
Explanation:Among the choices provided, the true statement is d. cytokinesis differs in plant cells and animal cells. In animal cells, cytokinesis occurs through the formation of a cleavage furrow that pinches the cell into two, while in plant cells, a cell plate forms along the centerline of the cell, eventually leading to the development of a new cell wall that separates the two daughter cells.
Prokaryotic cells, such as bacteria, do not divide by mitosis because they lack a nucleus and instead divide by a process known as binary fission. The other statements provided are false since prokaryotes have a single, circular chromosome (therefore, the claim that eukaryotes have circular chromosomes is incorrect), and animal cells do not form cell walls when they divide (they only form a new cell membrane).
Photosynthesis is broken up into two reactions: light dependent and light independent/dark. Explain in detail what is taking place in the light dependent reactions.
Answer: In light dependent reaction, CO2 and water enter the leaf through stomata from the environment. Water molecules splits into oxygen molecule when the light hits the pigment in the membrane of a thylakoid called chloroplast. Then the electrons move down to enzymes. Sunlight allow the enzymes to convert ADP to ATP and NADP+ is converted into NADPH. The ATP and NADPH is used by the calvin cycle to convert carbon dioxide into simple sugar glucose.
what two things are needed to make a geomagnetic time scale?
Answer:
Geomagnetic north and south pole.
Explanation:
It is primarily dipolar (That is, it has two poles, the geomagnetic North and South poles) on Earth’s surface. Away from the surface the dipole becomes distorted.
State one use of lipid in the body
Answer:the body uses lipids as an energy store,as insulation and to make cell membranes.
Explanation:lipids include fats(solid at room temperature) and oils (liquor at room temperature).lipids are an important part of healthy diet.
Answer: The use of lipid is as follows:
Explanation:
A lipid is chemical substance which is insolube in water but can be dissolved in the organic solvent like alcohol.The lipid is an important component of the cells of the living beings.The cholesterol and triglycerides are the examples of lipids. The lipid is composed of carbon, oxygen and hydrogen. The lipid transport the vitamins like A, D,K and E and aid their digestion in the small intestine.
Assignment:
Show the punnett square and phenotypic ratios for the following crosses:
1) Both the father and mother have type O blood.
Phenotypic Ratio:
What the answer
The phenotypic ratio for the cross of two parents with type O blood is 100% offspring with type O blood since both parents have the genotype ii. A Punnett square would show all offspring as 'ii', representing type O blood.
Explanation:The question is asking to show the phenotypic ratios for a cross where both parents have type O blood using a Punnett square. Blood type O is represented by the genotype ii because type O is a recessive trait. Since both parents have type O blood, the genotype for each parent would be ii. Setting up a Punnett square:
Parent 1All offspring will have the genotype ii, which corresponds to type O blood. So the phenotypic ratio for this monohybrid cross is 100% type O blood type offspring. No other blood type is possible from this cross.
Will give brainliest plz help I only need help with the 2nd question
Answer:
Secondary Consumers
Explanation:
If the larvae eat the needles, they are the primary consumers and herbivores. Because they eat the larvae, the birds become the secondary consumer. Tertiary consumers are at the top of the food chain, and eat secondary consumers and primary consumers. Primary producers are energy producing things like plants, etc.
What are the basic types of immune system cells? Select all that apply.
lymphocytes
O red blood cells
o granulocytes
monocytes
o antigens
DONE
Answer:Lymphocytes
Monocytes
Granulocytes
Explanation: Granulocytes is a category of the types of white blood cells.
White blood cells are the cells responsible for body immunity and they consisit of 5 types among which are Lymphocytes and Monocytes
Answer:
All the 'cytes
Explanation:
What is gene regulation?
O
A. The manner in which phenotypes differ from genotypes
O
B. The total number of genes a person has
O
O
c. The control of when and where proteins are made
D. The number of proteins an organism can produce
The control of when and where proteins are made.
The process can be complicated and is carried out by a variety of mechanisms, including through regulatory proteins and chemical modification of DNA.What is gene regulation?
Gene regulation is the process used to control the timing, location and amount in which genes are expressed.
Regulation of gene expression is a complex process that can be controlled at several steps, including:-
Transcription. Pre-mRNA splicing and export.mRNA stability.Translation. Protein modification.Protein half-life.To know more about gene here
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Scientists now know how much carbon dioxide was present in the atmosphere as far back as 800,000 years ago. How did they obtain this data?
Answer:
Ice core records.
Explanation:
The origin of man took place about 200,000 years ago and looking at the records that are stored in the ice cores before the existence of man which were found by the deep drilling of the antarctic and Greenland shows that how the temperatures have changed and as the example of the carbon in the air. As in the 800,000 years go the Carbon dioxide levels were on average of 170 to 280 ppm and now they have crossed the 400 ppm mark also at that time the sea levels were high as 80 feet and now are more than 100 feet.Answer:
Scientists now know how much carbon dioxide was present in the atmosphere as far back as 800,000 years ago. How did they obtain this data?
fossil finds
computer models
ice cores
glacier striations
Explanation:
Answer Ice Cores
Scientists use several methods to reveal Earth’s climate history. These methods include the study of glacial striations, fossils, and ice cores.
As glaciers move, they trap and drag rocks beneath them. The grooves that result in the underlying landscape are called glacial striations. Glacial striations have been found in areas of the world that are not currently covered in glaciers, but which must have been covered in ice sheets at some point.
In what organism would you find cell division being completed by cytokinesis, a process in which a new plate forms between two daughter nuclei?
Question 14 options:
animal
bacterium
plant
Answer:
Plant
Explanation:
Cytokinesis, the division of the cytoplasm to form two new cells, overlaps with the final stages of mitosis. In plants, the cell plate forms down the middle of the cell, splitting it into two daughter cells separated by a new wall.
By what cellular process does hair grow back
Answer:
The hair growth cycle consists of three phases: anagen, catagen, and telogen. Anagen, the growth phase, lasts between 3 and 10 years. During this phase, rapid cell division occurs in the hair bulb and dermal papilla. In addition, new hairs begin to protrude from the scalp.
Explanation:
Hair grows back due to cell division or mitosis in the hair follicles, specifically the division of stem cells. This process is cyclic, consisting of three phases (anagen, catagen, telogen), averaging a growth rate of about 0.3 mm per day. Diet, hormones, and aging can impact this growth cycle.
Hair growth is a result of the cellular process known as mitosis, taking place within the hair follicle. It begins with the division of stem cells, which generate new keratinocytes, the cells that make up most of the hair shaft. The hair growth cycle consists of three distinct phases:
The anagen phase: This growth phase involves rapid cell division at the root of the hair, which lasts from 2 to 7 years and pushes the hair shaft upward.The catagen phase: A transitional phase that lasts 2 to 3 weeks, signaling the end of active hair growth.The telogen phase: A resting phase where no growth occurs, lasting about 2 to 4 months. Post this phase, a new anagen phase begins, pushing out the old hair.These phases ensure that hair grows, sheds, and is replaced in a cyclical pattern. Growth rates average at about 0.3 mm per day or 1 cm per month. Factors such as protein-inadequate diets, hormonal changes, or the aging process can affect this cycle, potentially leading to hair loss.
As of 2011, an estimated _____ a0 percent of the U.S. workforce was working in agriculture-related jobs.
I cannot find an answer to this!
Answer:
In 2011 an estimated 1.65% of the US workforce was employed/working in the Agriculture-related sector of the economy
Explanation:
Agriculture has been a major source of jobs for most countries especially with developing/underdeveloped countries ranking in the highest percentage of their country's population working in this sector, while developed countries like the US have smaller percentage of the population working agriculture-related jobs. as of 2011 chad had an estimated 86.67% of their population involved with Agriculture-related jobs
What is a main difference between a mixture and a pure substance?
Answer:
A mixture is made up of more than one element while a pure substance is made up of one type of atom.
Explanation:
Answer:
A mixture can vary in composition, but a pure substance has a set composition.
Explanation:
right on edg
What happens in the human body as heart rate is increasing?
what is the innermost layer of the atmospherewhat is the innermost layer of the atmosphere extending 17 km above sea level at the topics and about 7 km above the Earth's North and South Poles
Answer:
The innermost layer of the atmosphere is TROPOSPHERE.
Explanation:
Atmosphere - The gaseous surroundings of earth is known as atmosphere. On the basis of variations in temperature, atmosphere has several layers as follows-
Troposphere- It is the innermost layer of the earth. extending 17 km above sea level at the equator and about 7 km above the earth's poles.Weather phenomenon occurs in this layer.It is known as troposphere because of vigorous air current.
Stratosphere- It is the second layer above troposphere.It extends approx 50 km above the earth surface.Ozone is also found in this layer. ozone plays very important role in maintaining thermal balance.
Mesosphere- It is the third layer of earth surface.Extending approx 50 to 85 km above the earth.Here temperature remains low.And at the top of this layer i.e, mesopause has the coldest temperature.
Thermospher- Temperature in this region is slightly high because of absorption of solar light.
Exosphere- It is the outer most layer of earth. Any particle or object in this layer if moving very fast can escape to the space. The exopause boundary of exosphere is approx 250-500 km above the surface. This is the transition layer between earth atmosphere and space
Where are the protein
channels that are used during
facilitated diffusion located?
A. outside the cell
B. inside the nucleus
C. inside the cell membrane
Protein channels used in facilitated diffusion are located in the cell membrane and include channel proteins and carrier proteins that help ions and molecules to cross. Hence, the correct option is C.
The protein channels that are used during facilitated diffusion are located within the cell membrane, which acts as a barrier between the interior of the cell and the external environment. These channels consist of two main types of proteins: channel proteins and carrier proteins. Channel proteins form pores in the membrane that allow specific substances to pass through based on size and charge, while carrier proteins selectively bind substances on one side of the membrane, change shape, and then release the substance on the other side.
Sunlight includes three types of light. Describe each one
Answer:
Visible light, ultraviolet light and infrared light
Answer:
1. visible light, with wavelengths between 0.4 and 0.8 micrometre,
2. ultraviolet light, with wavelengths shorter than 0.4 micrometre,
3. infrared radiation, with wavelengths longer than 0.8 micrometre.
Explanation:
What is the difference between aerobic and anaerobic processes
Answer:
The principle difference between aerobic and anaerobic process is aerobic process requires oxygen and generate more energy whereas anaerobic process occurs in absence of oxygen and generate less energy.
Explanation:
Aerobic process or aerobic respiration include glycolysis,TCA cycle and oxidative phosphorylation.As a result during Aerobic respiration a glucose molecule undergo complete oxidation to form CO2 and H2O along with 38 molecules of ATP.
On the other hand Anaerobic process or Aerobic respiration only involves glycolysis.As a result no TCA cycle and oxidative phosphorylation occur during Anaerobic process.Glycolysis that occur during Anaerobic produces only two molecules of ATP.
During anaerobic respiration the end product of pyruvate undergo lactic acid fermentation to form as well as to regenerate NAD+.
The process that requires oxygen is called an aerobic process while a process that doesn’t air is called anaerobic process.
Explanation:
Processes in nature are aerobic and anaerobic. For anaerobic processes , air is not an essential element while it is not so for aerobic processes. There are several examples of aerobic and anaerobic processes in nature. Respiration, an important biological process sometimes takes place anaerobically in some organisms while most of the organisms respire aerobically.
Some bacteria can respire anaerobically. When organisms like yeast respire anaerobically alcohol and carbon dioxide is released.
What happens to the density of the Earth’s Layers as you move towards the core of the earth
Answer:
Core is the densest layer of the earth.
Explanation:
The structure of the earth's interior is made up of several concentric layers. The earth's interior is divided into three layers- The Crust, the mantle and the core. The density of the outermost layer the crust is 3 g/cm^3. As we move towards the interior, the earth become more dense. The density of the second layer mantle ranges between 2.9-3.3 g/cm^3. The core is the innermost layer of the earth, surrounding the earth's center. the density of the core ranges between 9.5-14.5 g/cm^3.