Increasing demands on what resources come with a growing human population?

What is the next step in muscle contraction after the actin changes shape?

Imagine you are a geneticist interested in studying a newly discovered species of very colorful birds. you have found that a single gene is responsible for their beautiful colors and that yellow birds are homozygous for the yellow allele, blue birds are homozygous for the blue allele and green birds are heterozygous for these alleles. you focused your efforts on studying one specific population and counted 9% yellow, 49% blue and 42% green birds. what are the allele frequencies in this population? \

Which two criteria must be met before scientists can use radicarbon dating? explain your answer describe how the meteorite collision at the end of the mesozoic affected the atmosphere and the biosphere.