• 26. Many pharmaceuticals and therapeutic agents used by are derived from tissue and organs from
slaughtered
animals.
27. Today there are more than
breeds
worldwide.
• 28. A gelding is a
horse.

How are the testes and ovaries similar? a. both produce sex cells. b. both connect internal reproductive organs to the exterior. c. both transport sex cells from their site of production. d. both store mature sex cells.

Which best describes a gene? a. a sister chromatid b. a chromosome c. a tetrad d. a piece of a chromosome

Do plant cells perform cellular respiration?