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aksik [14]
3 years ago
11

A membrane that allows onaly some materials to move in and out of the cells is ​

Biology
2 answers:
Allushta [10]3 years ago
8 0

The cell membrane is selectively permeable, allowing only certain substances to pass through. Passive transport is a way that small molecules or ions move across the cell membrane without input of energy by the cell. The three main kinds of passive transport are diffusion, osmosis, and facilitated diffusion.

Anit [1.1K]3 years ago
5 0

That's a Cell Membrane.

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Rhodobacter cells perform photosynthesis in the presence of light and grow heterotrophically in the dark. After being cultured i
Marrrta [24]

Answer:

Phenotypic changes:

When Rhodobacter is cultured in total darkness for multiple generations, the ability to produce it's own photopigment reduces with time with little or no ability to undergo its own photosynthesis due to absence of enzymes or pigment for photosynthesis.

It becomes expensive for the Rhodobacter to undergo photosynthesis. This allows mutants that can grow in the dark to take over from the culture grown in the dark.

Evolutionary processes:

It's natural selection that allows the fittest organism to survive. As in the case of the mutants

5 0
3 years ago
How does the function of melanin explain not only the variety of skin colors but susceptibility to skin cancer?
Mice21 [21]
<span>The lack of melanin tends to correlate with a lighter skin color. However, it also correlates with a higher susceptibility to receiving a sunburn. The more often a person burns, the more likely it is that a person will be susceptible to skin cancers later on in life.</span>
6 0
3 years ago
Read 2 more answers
The three types of ocean floor sediments are classified according to their _____
Pie
<span>Origin

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6 0
3 years ago
Read 2 more answers
A lone male wolf, who doesn't have a pack, travels the forest. When he reaches a new hill that he hasn't been on before, he spen
VLD [36.1K]

Answer:

The correct answer is option B. pheromones.

Explanation:

Pheromones are chemical substances that are released and produced by a different type of animals, into the environment, for marking their territory or affecting behaving of its species.

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Thus, the correct answer is option B. pheromones.

3 0
3 years ago
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