Answer: B) proteins in the membrane act like gates to control entrance and exit of molecules.
Explanation: Plasma membrane is composed of phospholipids bilayer in which the hydrophobic regions of the phospholipids face each other to form the core of the bilayer. Proteins are embedded in the bilayer through an interaction between the amino acid side chains and the nonpolar acyl chains of the phospholipids. The embedded membrane proteins form channels for passage of ions and other molecules. Each membrane protein is selected for one or more ions or molecules that passes through it. The membrane is said to be semipermeable because it allows the passage of some molecules and excludes the passage of others.
Answer:
B.) The amounts of A, T, G and C in DNA varies from species to species and C.) In any ome species, the amount of adenine closely approximates that of thymine D.) In any one species, the amount of guanine closely approximates that of cytosine
The compost species required for breaking down compost-able garbage are: earthworms, slugs, beetle and fruit fly.
<h3>What is compost?</h3>
Compost refers to waste composed of dead and decaying leaves and organic matter which is used as manure to enrich the soil.
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Composting helps to remove organic waste from the environment.
Compost requires some species if organisms which help to degrade the waste matter.
Some compost species which can be used to treat the problem of waste disposal include earthworms, slugs, beetle and fruit fly.
Therefore, the composition of compost species for breaking down compost-able garbage is: earthworms, slugs, beetle and fruit fly.
Learn more about compost at: brainly.com/question/4620473
