Adjustment knobs are used to focus light in a light microscope
Answer and Explanation:
Corals are a type of invertebrate within the <u>phylum Cnidaria</u>. They live in colonies of many identical individual polyps.A set of tentacles surround a central mouth opening. They also have a simple, radially-symmetrical body containing a single opening that serves as both the mouth and anus. The body is made up of two layers of cells, separated by a jelly-like layer with no internal organ. The two layers of cells make a single cell surrounding the body.
Heredity is the passing on of traits from parents to their offspring, either through asexual reproduction or sexual reproduction, the offspring cells or organisms acquire the genetic information of their parents.
I believe the situation is something like the birds with shorter/longer beaks (depending on the situation) survive.
To answer the question, we have to understand the meaning of natural selection. natural selection is where the organisms with more favourable characteristics survive and reproduce and pass on the genes to offsprings while some of the organisms with less favourable characteristics die, so that there would be more organisms with that favorable characteristic in the population.
So in order to have natural selection happen, Birds must have different lengths of beaks, in order to make it happen, genetic variation must occur. if all the birds have the same length of beak, the either all survive or die, which is not the definition of natural selection.
Therefore, your answer should be genetic variation.
Answer:
Passive transport
Explanation:
Water is transported through channel proteins called aquaporins.