What does selectively permeable membrane mean

Answers

Answer 1

Answer:

Answer:

The answer is: It means it is a membrane that will allow certain molecules or ions to pass through it by means of active or passive transport.

Explanation:

All cells are enclosed with a cell membrane. The term, selectively permeable, refers to :

the membrane allows some substances or molecules to enter the cells, and others to be prevented from entering. It also allows substances to leave the cell.

This process can be done by :

Active transport -requires the cell to expend energy to move the materials.

Passive transport- it can be done without using cellular energy.

Answer 2

Answer:
Selective permeability membrane is the membrane that allows certain organisms to come in and out of the cell.

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List two non-living (abiotic) forms of carbon in the cycle and give the chemical formula of each.

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Two abiotic forms of carbon are CARBON DIOXIDE AND METHANE.
The element carbon is continuously been recycled in nature. The abiotic components of the carbon cycle refers to the non living part of the carbon cycle which has influence on the living part. Methane is a type of fossil fuel whose major component is carbon.
The chemical formula of carbon dioxide is CO2 while that of methane is CH4.

The smog in this city is an example of what type of pollution

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industrial pollution from factories, but to classify it would be air pollution.

*****100 POINTS****What is the relationship among chromosomes, genes, and DNA?

Genes are found on long strands of DNA. DNA is tightly wound into chromosomes.

Genes read the DAN code found on chromosomes. Chromosomes are long tightly wound strands of DNA.

DNA reads the nucleotide sequences found in genes. Genes are located on tightly wound structures called chromosomes.

Chromosomes are sections of DNA found on genes. Genes are long, tightly wound strands of DNA.

Answers

Answer:

it is the third option: DNA reads the nucleotide sequences found in genes. Genes are located on tightly wound structures called chromosomes.

Explanation:

Answer:

Its the last one

Explanation:

The arctic fox has adapted to its environment in a number of ways. Its fur turns white in winter and it does not begin to shiver until temperatures plunge below 10 degrees Fahrenheit. Global warming is likely to bring many changes, including an increase in mean air temperature. Over time, the arctic fox will have to adapt to this change. Which adaptation is MOST LIKELY to occur? A) Its paw pads may thicken. B) Its fur may stay white longer. C) Its tail may have thinner fur. D) Its ears may be shorter and rounder.

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Answer: C) Its tail may have thinner fur.

Adaptation is the change or alteration in the organism which imparts changes in the structure, physiology and behavior of the organism. These changes allows the organism to survive in the drastic environmental conditions.

In the given situation, artic fox being living in the cold environment Its tail may have thinner fur. is the correct type of adaptation which may allow the artic fox to survive in changing environmental conditions due to global warming. As, global warming may cause change the climatic conditions of the artic regions. The thin fur may allow the loss of heat during summer conditions.

I believe the answer is C.

Why was sputnik important?

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This period of, Russia and the US both wanted to be the first person to reach the moon. Sputnik was made by the Russians and gave Russians a good head start to get to the moon .

A certain gene in a chromosome has the following sequence of nucleotides:ACC TTA GGC CCT TCA
What would be the 2nd codon of mRNA made from this strand of DNA?
A.AAU
B.UUT
C.AAT
D.TTA

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The answer is AAU (A.)

Answer:

Explanation:

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