Sometimes folding causes layers to what

Creation of an unnaturally uniform sample to represent a diverse populationcan be avoided by: a. including only willing b. asking another scientist for .c. choosing only identical participants.d. selecting individuals at random.

The galapagos island contain 13 species of finches four of the species are seen here it is believed that all of the species had one common ancestor and overtime

This is a situation in which genes are attached to an organism's sex chromosomes; the sex of an organism influences the expression of a gene.