These unsegmented worms have a full digestive system even when parasitic.
Answer:
it happens when 2 organisms jelp each other beneficial.
Explanation:
eg:algae and leguminous plants.the algae live on the roots and take in the nitrogen from the soil,which the plant cannot do and needs for growth.it takes in the nitrogen and pases it to the roots and even make the soil loose for the roots to move and they get a living space(algae on the roots).
The central nervous system of the frog is different from that of humans; if the optic nerve of a frog is cut, the animal will be able to see again within weeks but the same damage in humans would cause permanent blindness :).
Genotype is the genetic constitution of an individual organism.
For example<span>, two organisms that have even the minutest difference in their genes are said to have different </span>genotypes<span>.</span>
