How does learning about animal structure, fossil records, and DNA sequencing from species that no longer exist help us care for the species that exist today? Write a paragraph answering this question. Include the following terms in your homology, common ancestor, and embryonic development.

In which part of the body is a ball-and-socket joint found?

Which of the following best describes the purpose of the parathyroid hormone? a. it decreases the blood calcium level and decreases blood phosphorus level. b. it decreases the blood calcium level and increases the blood phosphorus level. c. it increases the blood calcium level and increases blood phosphorus level. d. it increases the blood calcium level and decreases blood phosphorus level.

How do the sperm cells get from the stigma to the ovules?