BIOLOGY HIGH SCHOOL

A cell membrane is very specific about what it allows across. How does this help the cell?A. The cell works better when it contains fewer protein
B. It helps the cell absorb as many different molecules as possible
C. It is better for the cell if most molecules are prevented from entering
D. Transports protein only allow enzymes to pass through the membrane

Answers

Answer 1
Answer:

It is better for the cell if most molecules are prevented from entering.

  • The cell membrane is called semi permeable so it allow selective substances to pass through it.

What is cell membrane?

  • The cell membrane, also called the plasma membrane, is found in all cells and separates the interior of the cell from the outside environment.
  • The cell membrane consists of a lipid bilayer that is semipermeable.
  • The cell membrane regulates the transport of materials entering and exiting the cell.

What are the functions of cell membrane?

The cell membrane, therefore, has two functions:

  • To be a barrier keeping the constituents of the cell in and unwanted substances out.
  • To be a gate allowing transport into the cell of essential nutrients and movement from the cell of waste products.

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Answer 2
Answer: C)It is better for the cell if most molecules are prevented from entering
This is a theory that is known for this question. 

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What particles make up the nucleus of an atom?

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The nucleus is made up of protons and neutons. The above answer is incorrect. Other things of the nucleus include the nucleolus, nuclear membrane, nuclear pores, and chromatin, which contains DNA.

Unlike vitamins, minerals are A. needed in small amounts
B. nutrients
C. provided by food
D. inorganic

Answers

Unlike vitamins, minerals are Provided by foods

C. needed in small amounts.

Minerals are also needed for the body although this should be taken in a very controlled amounts only.
Minerals and vitamins combined form the micro-nutrients of the body.
With micronutrients, only relatively little amount of nutrients is required to improve health. They are usually in milligram and microgram amounts and are enough to sustain to the metabolism and growth supplication. On the other hand, macronutrients are those that need large portions and quantities such as carbohydrates, fats and proteins. We need more of these to be converted to energy for movement and muscle growth. 

All living things must contain genetic material. Which of the following nonliving things also has this characteristic? A. Fire B. Cell phone C. Virus D. Organic phosphates

Answers

Genetic material is the hereditary unit found in the cells of every living organism. Viruses are nonliving things that also have genetic material. Thus, option C is correct.

What are viruses?

Viruses are organisms that are living and nonliving as they reproduce when once inside the host cell and have the RNA or the DNA as the genetic material inside their capsids.

The protein shell of the virus includes one of the types of genetic material that infects the host DNA by taking control of the host machine to produce multiple copies.

Therefore, the virus is a non-living with genetic material.

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Helium has an atomic number of two, so its outer energy level is full. Helium is considered _____.neutral
inert
an anion
a cation

Answers

Helium has an atomic number of two, so its outer energy level is full. Helium is considered inert. The correct option among all the options given in the question is the second option. It is actually non toxic in nature. Helium is also colorless, odorless and tasteless in nature. It is the first in the noble gas group of the periodic table.

Answer:

inert

Explanation:

Why are grassland and forest soils good for farming?A.
A layer of permafrost prevents the decay of organic material that enriches the soil.

B.
Too much water promotes chemical weathering and washes away nutrients.

C.
There is enough water to promote chemical weathering, but not enough to wash away nutrients.

D.
There is not enough rainfall to promote chemical weathering or retaining nutrients.

Answers

I believe the answer is C. Grasslands and forests do not have permafrost--present in tundra and taiga so A can be eliminated. B  is not right because forests and grasslands definitely do not get TOO much rain, assuming they're not talking about tropical rain forests. 

What are 4 words that describe chlorophyll

Answers

Green, pigment, Photosynthesis, Chloroplasts
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