Answer:
Regulator Molecules of the Cell Cycle. In addition to the internally controlled checkpoints, there are two groups of intracellular molecules that regulate the cell cycle. These regulatory molecules either promote progress of the cell to the next phase (positive regulation) or halt the cycle (negative regulation).
Explanation:
Regulator Molecules of the Cell Cycle. In addition to the internally controlled checkpoints, there are two groups of intracellular molecules that regulate the cell cycle. These regulatory molecules either promote progress of the cell to the next phase (positive regulation) or halt the cycle (negative regulation).
What is the source of energy in most ecosystems?
animals
plants
oxygen
sunlight
Answer:
The Sun, (Sunlight)
Explanation:
Write a one sentence summary about viruses .
Answer:
A virus is a non-living structure that reproduces by infecting live cells (In any living organism be it a plant or animal) and killing them to spread more viruses around to other live cells, repeating the cycle of a virus.
which theory states that homo sapiens began in a single geographical area and spread out from there?
a. out of africa theory
b. tectonic theory
c. multi-regional theory
Answer:
The out of Africa theory states that Homo sapiens began in a single geographical area and spread out from there.
Explanation:
A is correct because the ''out of Africa theory'' suggests that the Homo sapiens began as a species in Africa and from there it gradually spread out on the other continents across the world.
B is not correct because the ''tectonic theory'' is a theory that has nothing to do with the Homo sapiens species, but it is a theory about the movement of tectonic plates.
C is not correct because the multi-regional theory suggests that the Homo sapiens evolved into multiple regions simultaneously, not in one region only.
if a person didn’t have red cones, how would their perception of color change?
Answer:
They would be color blind.
Explanation:
For example, if the red cone is missing you will be unable to see colors containing red as clearly. There are several different types of color blindness. Dichromatism is when one of the cones is missing.
Answer:
if the red cone is missing you will be unable to see colours containing red as clearly. There are several different types of colour blindness. Dichromatism is when one of the cones is missing.
4. In which International Metric units are length measurements expressed?
Answer:meters
Explanation:
Do you think water could break up NaCl if it didn’t have a + and - side?
Answer:
yes because fajamarutation procedure
Explanation:
explain what surface tension is
Answer: the tension of the surface film of a liquid caused by the attraction of the particles in the surface layer by the bulk of the liquid, which tends to minimize surface area.
Explanation:
Li-Fraumeni syndrome (LFS1) is a rare hereditary disorder that leads to a predisposition to cancer. This hereditary disorder is linked to mutations in the tumor suppressor gene encoding the transcription factor p53. p53 acts at the G1 checkpoint. If damaged DNA is detected, p53 halts the cell cycle. As p53 levels rise, the production of p21 is triggered. p21 enforces the halt in the cell cycle. A variant of Li-Fraumeni, called LFS2, is thought to occur due to a mutation of the CHK2 gene, which is also a tumor suppressor gene. CHK2 regulates the action of p53. Which of the following cascades is most likely to occur in a normal cell that does not contain the LFS mutation?
Answer:
CHK2, p53, p21, cell cycle progression.
Explanation:
In a normal cell with no LFS mutation, during the G1 stage of cell cycle progression, the CHK2 activates if there is damage in the DNA. CHK2 activates p53, which is a tumor suppressor protein that will hold the cell cycle in G1/S until the DNA is repaired. The p53 protein activates p21, a protein that binds to CDK2 and stops the cell cycle. The cell cycle will continue once the damage is repaired.
22.-26 Fill in the blank. The Cell Theory states:
All
things are composed of
are the basic unit of structure and
in living things.
New cells are created from
Answer:
1.living things
2.cell
3.cell
4.function
5.pre existing cell
Explanation:
Individuals tend to make decisions with the elimination-by-aspects strategy as choices become more simple. Please select the best answer from the choices provided OT o F
Answer:
false
Explanation:
hope this helps :)
It is false that individuals tend to make decisions with the elimination-by-aspects strategy as choices become more simple.
What is decision making?The process of making choices by identifying a decision, gathering information, and evaluating alternative resolutions is known as decision making.
By organizing relevant information and defining alternatives, a step-by-step decision-making process can help you make more deliberate, thoughtful decisions.
The significance of decision making is found in how it assists you in choosing between various options.
Before making a decision, it is necessary to collect all available information and weigh its pros and cons. It is critical to concentrate on steps that can assist in making sound decisions.
The ability to choose between two or more alternatives in order to achieve the best result in the shortest amount of time.
Thus, the given statement is false.
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how do you write 0.625 as a whole number
Answer:
1
Explanation:
rounding
Recognize what energy is and how it is transferred throughout living systems.
Explanation:
Energy is the ability to do work. There are two main forms of energy, potential and kinetic energy.
Potential energy is the energy at rest in a body
Kinetic energy is the energy due to motion
Energy is usually transferred throughout living systems when are transformed from one form to another. For example, chemical energy in food produced by plants is taken by animals as food. They then convert the chemical energy into other forms of energy like heat energy which they use for their daily activities.why genetic factor is very important in crop production
Answer:
The wise use of crop genetic diversity in developing improved crops can contribute significantly to protecting the environment. Crop varieties that are resistant to pests and diseases can reduce the need to apply harmful pesticides. More vigorous varieties can better compete with weeds, reducing the need for applying herbicides .
Explanation:
when a raw, shell-less egg was placed in sugar solution the egg shrank the egg was brought back to its original size by placing it it water which process does the experiment demonstrate
Answer:
A: osmosis. The egg first expanded because it was placed in a hypertonic solution (sugar water), causing the water to exit the egg to balance the higher concentration of solute outside of the egg. Placing it in fresh water creates a hypotonic environment, thereby causing water to rush back in.
Explanation:
How much do you need to drink?
About 15.5 cups (3.7 liters) of fluids a day for men. About 11.5 cups (2.7 liters) of fluids a day for wome
I just bombed this test and i have 1 retake left. please help!!
Answer:
Hey!
Your answer is EXERGONIC reactions!
Explanation:
The Ex- in the word symbolises that energy is RELEASED (exit)...most commonly thermal energy is released during the reactions...
They are also reactions that happen suddenly and without any assistance from the likes of enzymes or assisted contact or any other energy source!
I HOPE THIS HELPED YOU!how are elements in the same group in the periodic table alike
Answer:
they have similar atomic masses
Explanation:
The almost pure cellulose obtained from the seed threads of Gossypium (cotton) is tough, fibrous, and completely insoluble in water. In contrast, glycogen obtained from muscle or liver disperses readily in hot water to make a turbid solution. Despite their markedly different physical properties, both substances are (14)-linked D-glucose polymers of comparable molecular weight. What structural features of these two polysaccharides underlie their different physical properties
Answer:
Cellulose is held by beta 1,4-glycosidic bonds making it linear while Glycogen is held by an alpha 1,4-glycosidic bond making it highly branched.
Explanation:
Cellulose and Glycogen are both carbohydrate polysaccharides formed from glucose monomers. According to the question, cellulose is a tough, fibrous, and insoluble (in water) polymer found to play a structural role in plants' cell wall while Glycogen is another polymer obtained from muscle or liver and disperses readily in hot water to make a turbid solution.
Although these two polysaccharides (cellulose and glycogen) are linked by (1, 4)-glycosidic bonds but the glucose monomers in CELLULOSE are linked by a beta 1,4-glycosidic, hence, making it a straight or linear polymer
GLYCOGEN, on the other hand, is linked by an alpha 1,4-glycosidic bond making it an highly branched polymer. This structure is responsible for the different physical properties of the two molecules.
Why do scientists think duck-billed dinosaurs lived in groups ANSWER FAST!!!!!!!
Answer:
Scientists thought duck-billed dinosaurs lived in groups because most of their fossils were together unlike tyrannosaurus rex
Explanation:
What factor determines the trait of an organism
A order of nucleotides in the DNA molecule.
B location of the DNA molecule within the cell.
C length of the original DNA strand.
D number of times the protein has already been produced.
Answer:
A order of nucleotides in the DNA molecule.
NEED HELP ASAP
Which of the following is used for STRUCTURE and not for ENERGY?
A)glycogen which stores excess glucose consumed by animals
B)starch which stores excess glucose made during photosynthesis in plants *
C)cellulose which is difficult to break apart
Answer:
the answer is option c cellulose..
Explanation:
Cellulose is a molecule, consisting of hundreds – and sometimes even thousands – of carbon, hydrogen and oxygen atoms. Cellulose is the main substance in the walls of plant cells, helping plants to remain stiff and upright. Humans cannot digest cellulose, but it is important in the diet as fibre.
Starch or amylum is a polymeric carbohydrate consisting of numerous glucose units joined by glycosidic bonds. This polysaccharide is produced by most green plants as energy storage
Glycogen is a multibranched polysaccharide of glucose that serves as a form of energy storage in animals, fungi, and bacteria. The polysaccharide structure represents the main storage form of glucose in the body.
hope it helped you and the answer is correct
The term that is used for structure and not for energy is cellulose, which is difficult to break apart. The correct option is c.
What is cellulose?A molecule called cellulose is made up of hundreds, and occasionally even thousands, of carbon, hydrogen, and oxygen atoms. The primary component of plant cell walls, cellulose, keeps plants rigid and upright.
A polymeric carbohydrate known as starch or amylum is made up of many glucose units connected by glycosidic linkages. Most green plants synthesize this polysaccharide as a form of energy storage.
Animals, fungi, and bacteria all use the multibranched polysaccharide of glucose known as glycogen to store energy. The primary form of glucose storage in the body is represented by the polysaccharide structure.
Therefore, the correct option is C) cellulose, which is difficult to break apart.
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can someone give me these answers please?
Answer: ok
Explanation:
where is glucose produced
Answer:
The liver produces, stores, and releases glucose depending on the body's need for glucose, a monosaccharide. This is primarily indicated by the hormones insulin – the main regulator of sugar in the blood – and glucagon.
As a result of global warming, what evolutionary changes could we inher might eventually be seen in polar bears!
A They will develop thicker, warmer coats.
B. They will develop thinner and darker for
C. They will lose their ability to swim
D. They will become hervores.
Answer:
B. They will develop thinner and darker for-
Explanation:
To survive in a warmer climate you wouldn't put on a giant jacket.
Answer:
#lookitup.com
Explanation:
NEED HELP ASAP * is my answer
Scientists are studying compounds in a newly discovered rain forest plant. The plant produces an unusual substance that local people say acts as an anesthetic. One scientist tested the substance with the chemical indicator iodine.
If the test is negative, which type of macromolecule is not present in the substance?
nucleic acid
carbohydrate
protein
lipid
Answer:
protein
Explanation:
Answer: The macromolecul that is not present is carbohydrates
A Tomato Has A Proton Concentration Of 0.00006 M. How Would You Calculate The PH?
Answer:
Option b. is correct
Explanation:
If hydronium ion concentration [tex]H_3O^+[/tex] is given then pH is given by [tex]-log[H_3O^+][/tex]
The hydronium ion refers to the hydrogen ion in aqueous solution.
A Tomato has A Proton Concentration Of 0.00006 M
Here, 0.00006 is equal to 6 × [tex]10^{-5}[/tex]
So,
pH is given by - log [6 × [tex]10^{-5}[/tex]]
Option b. is correct
The pH of the tomato which has a proton concentration of 0.00006 M is given by –Log (6×10¯⁵)
The correct answer to the question is Option B. –Log (6×10¯⁵)
From the question given above, the following data were obtained:
proton concentration [H⁺] = 0.00006 M = 6×10¯⁵ M
pH =?The pH of tomato can be obtained as follow:
pH = –Log [H⁺]
pH = –Log (6×10¯⁵)Thus, the correct answer to the question is Option B. –Log (6×10¯⁵)
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.. Formulating Hypotheses Propose a hypothe-
sis to explain why angiosperms have become the
dominant type of plant on Earth.
Brodribb and Feild argue that more photosynthesis meant more carbon for growth. And that would have given the angiosperms the energy to push competitors like conifers out of the canopy around 150 million years ago, making angiosperms the most productive group of land plants in the world.
What is the correct order of steps in the scientific method?
A. Ask a question, make a hypothesis, test the hypothesis, draw
conclusions, and analyze results.
B. Ask a question, make a hypothesis, test the hypothesis, analyze
results, and draw conclusions.
C. Ask a question, analyze results, make a hypothesis, test the
hypothesis, and draw conclusions.
D. Make a hypothesis, test the hypothesis, analyze results, ask a
Answer:
B. Ask a question, make a hypothesis, test the hypothesis, analyze
results, and draw conclusions.
Explanation:
Answer:
B.Ask a question ,make a hypothesis, test the hypothesis, analyze
How is carbon dioxide fixed into carbon that is usable for biological life?
Volcanic activity
Decomposition
Photosynthesis
Answer:
The answer is photosynthesis
Explanation:
carbon dioxide fixed into carbon that is usable for biological life
All cells rely on passive and active transport of water and dissolved
solutes to maintain a stable internal environment which is called
1. Diffusion
2.homeostasis
3.equilibrium
4.metabolism
