What might happen to a cell if it no longer could produce cholesterol?
Answer:
Cholesterol plays important role in cell membrane and synthesizing essential molecules such as fat-soluble vitamins (vitamin D), hormones and bile acids to help us digest our food.
Cholesterol helped to regulate fluidity of membrane over the range of physiological temperatures. Generally, liver makes whole the cholesterol which is needed by our body. But from food (such as eggs, milk and meat) also cholesterol enters to the body.
In our body cholesterol is involves in the synthesis of vitamin D (is important for the growth of cells) and hormones, low level of these affects the health of the brain. If brain cells are not healthy, it leads to depression and anxiety.
The sides of a composite-cone volcano have which feature??
Jefferson’s class was studying sunflowers. They learned that sunflowers are able to make their own food. Which parts of a sunflower collect MOST of the sunlight needed to make food?
leaves
flowers
seeds
roots
Answer:
Flowers
Explanation:
Sunflower flowers are the part of the plant that receives most of the sun due to pollination. At the stage of maturity, sunflowers receive many sunrays, ensuring they get hotter, especially their flowers. This helps them to be pollinated in an easier way, since bees and other insects opt for hotter plants.
What happens to pyruvate molecules formed in glycolysis in the absence of oxygen? A. they will enter the krebs cycle B.they will undergo the process of fermentation C. They will move directly to the electron transport chain
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Why have plants evolved ways to prevent self-fertlization? Why do you cross-fertilization (plant to plant) more beneficial to the plant?
A population of beetles has both green and brown individuals. Initially, the beetle population contained mostly green individuals, but then the population changed so that most of the population was brown. Select the statements from the dropdown boxes to sequence the changes in the order in which they must have occurred to result in this change in the beetle population.
The environment changes, then the brown color improves survival, after which more brown beetles reproduce, and lastly the brown beetle population increases.
What is Survival?Survival is also known as the act of surviving which is defined as the tendency of something to continue to exist, especially when it does so despite conditions that may kill or destroy it. This concept can also be applied to humans and other living things, physical objects, and intangible things like as the beliefs or ideas.
"Survival of the fittest" is defined as the process of natural selection, a mechanism that drives evolutionary change where natural selection works by favoring individuals that are better adapted to a given set of environmental conditions. In the given example, changes which occur in the population occurs through the changes in the environment, and after which changes in the species occur.
Thus, the environment changes, then the brown color improves survival, after which more brown beetles reproduce, and lastly the brown beetle population increases.
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What would happen if the food chain was broken?
Wetlands support a large number of animal species. Chemical weed killers are dumped into this wetland and the aquatic plants are killed. We should expect ___________
A) the insect and insect larva
B) the migratory bird populations
C) the animals that breed and nest here
D) all the animals in and around the wetlands ________ to be affected by the death of the plants.
Answer:
D
Explanation:
In the following food chain, which organism receives the least amount of energy? plankton ⇒ shrimp ⇒ fish ⇒ seal
A. plankton
B. shrimp
C. fish
D. seal
The four nitrogenous bases found in DNA are cytosine, thymine, adenine, and deoxyribose sugar.
True false
th sun rises over the horizon frame of reference
Compare the role of active transport with that of osmosis in the movement of materials through phloem
Active transport in the phloem involves energy expenditure to concentrate sugars in the sieve tubes, creating a solute potential that attracts water osmotically. This increases pressure, driving bulk flow from sugar sources to sinks. Osmosis, being a passive process, relies on the solute concentrations established by active transport.
The role of active transport in the phloem involves the movement of sugars into the sieve-tube elements, a process that requires energy, usually in the form of ATP. This energy expenditure is crucial for phloem loading, where sugars are concentrated against a gradient from areas of lower concentration to higher concentration within the sieve tubes. In contrast, osmosis is a passive process where water moves across a semi-permeable membrane from an area of higher water concentration (lower solute concentration) to an area of lower water concentration (higher solute concentration) due to a solute potential created by the actively transported sugars.
Active transport creates a high concentration of solutes (sugars) which then osmotically attracts water from the xylem into the phloem, increasing the pressure within the phloem tubes. This increased pressure drives the bulk flow of the phloem sap from the source (where sugars are synthesized) to the sink (where sugars are utilized or stored). While osmosis does not require energy, the bulk flow in the phloem reliant upon osmosis indirectly depends on the energy expended for active transport during phloem loading and unloading.
how can a build-up of carbon dioxide in the atmosphere increase Earth's global temperature?
Which human body system does the nucleoid region most resemble and why?
The central nervous system (CNS) of the body.
which term describes a field where there are 20 moles per acre?
Which statement describes what happens to the carbon dioxide produced in cellular respiration?
Which scientist performed an experiment with results that provided evidence that microorganisms come from microorganisms, which disproved the theory of spontaneous generation?A. Marie Curie B. Louis Pasteur C. Charles Darwin D. Francesco Redi
Francesco Redi’s was an innovative scientist, physician, and poet. His scientific work resulted in a number of significant milestones: he showed that flies breed and lay eggs and do not, as was popularly believed, spontaneously generate; his microscopic examination of parasites marked the founding of modern parasitology; and in studying chemical treatments to kill parasites, he devised and performed the first controlled experiments in scientific history.
Which observation could be used to determine that an ocean organism carries out autotrophic nutrition
In which organelle does the DNA replication occur in the cell?
Dvd Credit card Stereo speaker Computer hard drive The listed devices all use which force? A) X rays B) magnetism C) electricity D) ultra violet radiation
do humans need photosynthesis to survive?
Humans absolutely depend on photosynthesis to survive as it is responsible for producing the oxygen we breathe and the food we consume. The energy in the food we eat originates from photosynthesis, which captures solar energy to create carbohydrates in plants. Photosynthesis also removes carbon dioxide from the atmosphere, which is particularly important as we burn fossil fuels.
Absolutely, humans depend on photosynthesis for survival. Photosynthesis is a process primarily carried out by plants, algae, and certain bacteria, which harness the sun's energy to convert carbon dioxide and water into glucose, a sugar that serves as food for many organisms, and release oxygen as a byproduct. This oxygen is what humans and other animals breathe. Moreover, the energy contained in food that all animals, including humans, consume can be traced back to photosynthesis. The process, therefore, supports both the oxygen we need to breathe and the food we need to eat.
Consider the energy journey—from the sun's energy to the carbohydrates in plants created through photosynthesis, then to the animals that eat those plants, and finally to the predators that eat those herbivores. In each step, the energy transferred originates from photosynthesis, and it illustrates the fundamental role this process plays in sustaining life on Earth. Through photosynthesis, organisms capture solar radiation and store it as high-energy electrons within carbon-carbon bonds of carbohydrates.
Moreover, photosynthesis not only fuels the earth's ecosystems but also cleanses our atmosphere by absorbing carbon dioxide, including that which we produce from burning fossil fuels. Thus, we see that our survival and way of life are intimately linked to photosynthesis, making it one of the most crucial biological processes.
Molecular composition A) High lead levels in a lake kill fish Flammability B) Gasoline catches fire Heat of combustion C) Water has two hydrogen atoms and one oxygen atom Toxicity D) The burning of coal releases heat
Describe what the nucleus looks like.
PLEASE ANSWER Which explains how the Calvin cycle and the Krebs cycle differ? The Calvin cycle uses ATP to make glucose. The Krebs cycle uses ADP to make glucose. Only the Calvin cycle occurs in plant cells. The Krebs cycle only repeats in animal cells.
According to research, the Calvin cycle uses ATP to produce glucose is the statement that explains how it differs from the Krebs cycle.
What is the Calvin cycle?It is the second stage of photosynthesis carried out by plants to incorporate the inorganic matter on which they feed, such as CO2.
In the stroma, the Calvin cycle reactions use chemical energy from ATP and NADPH for the reduction of CO2 molecules to form glucose, while the Krebs cycle must be responsible for generating a combination of metabolic energy.
Therefore, we can conclude that according to the context, the Calvin cycle uses ATP to produce glucose is the statement that explains how it differs from the Krebs cycle.
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200 milliliters is equal to:
200 milliliters is equal to 0.2 liters. A milliliter is equal to one-thousandth of a liter.
200 ml is equal to 1/5 liter. In the metric system, the relationship between a unit and its base unit is determined by its prefix. For example, the unit ‘milliliters’ has a prefix of ‘milli’, which means ‘one thousandth’. A milliliter is equal to one-thousandth of a liter.
A milliliter is a metric unit of volume. In the metric system, one milliliter is equivalent to one-thousandths of a liter or one cubic centimeter (1 cubic centimeter). According to the imperial system of measurement, a milliliter is a small unit of volume: 0.004 of a cup.
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Fossils in _______ layers of rock are generally estimated to be _______ than fossils found in the upper layers.
The total number of elements that have been identified is:
20
92
52
118
Compressibility A) How easily a substance can be set on fire
Flammability B) Measure of how much the volume of matter can decrease under pressure
Heat of combustion C) The readiness of a substance to undergo a chemical change
Reactivity D) Measure of how much heat is given off when a substance is burned
These are terms defining specific properties of substances in chemistry. Compressibility is a measure of the volume reduction of a substance under pressure. Flammability indicates how readily a substance can ignite. Heat of combustion measures the heat given off when a substance burns, and reactivity is a measure of how easily a substance undergoes chemical change.
Explanation:The terms mentioned in your question are various properties of substances measured in Chemistry.
Compressibility (B) is a measure of how much the volume of a substance can decrease under pressure. For example, gases are highly compressible since they can be compressed into a smaller volume under pressure.
Flammability (A) indicates how easily a substance can set on fire. This is determined by the substance's ability to react quickly with oxygen to produce heat and light.
Heat of combustion (D) is the measure of how much heat is given off when a substance is burned. This is essential in deciding fuels as higher the heat of combustion, the more effective the fuel.
Lastly, Reactivity (C) reflects the readiness of a substance to undergo a chemical change. Some substances, like the alkali metals, are very reactive and readily undergo chemical reactions.
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How are osmosis and diffusion alike
Answer:
Both processes occur through permeable bilayer membranes
This illustration is trying to demonstrate something that mitosis is not. In mitosis, the cells that are created are: ?
In mitosis, the cells that are created are identical and therefore the figure is meaningless.
What is mitosis?Mitosis is a cell division process that generates two genetically identical daughter cells (somatic cells).
Conversely, meiosis generates daughter germinal cell having the half of the genetic material (DNA).
In conclusion, in mitosis, the cells that are created are identical and therefore the figure is meaningless.
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