Which of the following statements is false regarding chromosomes?

a.

they are found in the nucleus of every eukaryote cell

c.

each of the duplicate chromosomes is called a chromatid

b.

plant and animal cells have the same number of chromosomes

d.

they contain dna

Humans are believed to have evolved in coastal regions in east africa. the region had an abundant supply of fish for early humanoids to eat. when scientists analyze the fads gene they see an interesting pattern. people whose families have lived in this area of east africa for generation show a high level of diversity in alleles for the fads gene. conversely, people whose families had migrated inland a moderate distance from sources of fish showed a much lower diversity for fads gene alleles. additionally, the fads alleles found in people whose family has lived inland for generation are almost all gene alleles which produce fads proteins with a high level of function and activity. how do anthropologists explain this?

Which short-term environmental changes would a very small asteroid or comet impact on earth most likely cause? check all that apply. flooding extinction craters on surface changes in weather patterns death of organisms and populations

This rapid change in species that rarely leaves behind fossil evidence is referred to as