Which hormone is released in response to low levels of circulating calcium?

What is the most abundant vertebrate on earth?

What do we call an individual that has inherited two identical alleles for the same trait? a.homozygous b.heterozygous c.monozzygous

In which order does sexual reproduction take place in plants? a. pollination, germination, fertilization b. germination, fertilization, pollination c. pollination, fertilization, germination d. fertilization , pollination, germination