To exhibit a recessive trait, an individual must have two recessive alleles responsible for the trait. One recessive allele is from a mother and another is from a father. However, if a person has one dominant and one recessive allele, it will not exhibit the recessive trait. This is because recessive allele will be masked by the dominant allele. So, parents must be heterozygous (one dominant and one recessive allele) and must give their recessive alleles to the offspring so that only offspring exhibit the recessive trait.
The energy in food substances is released via chemical reactions that take place within the mitochondria which are present in some single celled organisms.
The birds with the beaks most suited towards digging and grasping. If they find their food deep underground, the beak would need to be able to push through the dirt and be able to keep the worm in it for consumption.
True, because the kidneys filter out waste in most living things.
