Classification is a tool that is used to study living and extinct organisms. which of the following are levels in this system?
a. living and nonliving
b. families, genera, and species
c. endangered and not endangered
d. land, marine, and freshwater organisms

In a relatively small iguana population the allelic frequency is tracked for three generations. webbing is a recessive allele; no webbing is the dominant allele. during one very rainy spring and summer, a flood washes all the iguana without webbed feet out to sea. by the fall, and three generations later, you have the gene pool seen here.

Which type of neuron stimulates muscles to contract?

Aplant with dark red flowers is crossed with a plant with white flowers. all of the offspring have dark red flowers with white spots. the alleles got flower color in this plant are both dominant both recessive codominant incompletely dominant