What do birds have that distinguishes them from other organisms?
a. four-chambered hearts
c. amniotic eggs
b. wings
d. feathers

Apea plant that is heterozygous for the tall phenotype can produce short offspring when self pollinating. which of the following explains why this occurs? a. segregation of allels b. condominance of traits c. polygenic expression of traits d. independent assortment of alleles

Question#29: why does the tropical ocean have a greater temperature range than the temperate ocean?

Which of the following is the earliest era of earth's geologic time scale? cenozoic mesozoic precambrian paleozoic