BIOS 256 Final Exam Questions and Answers Already Passed

what are male gametes? Correct Answer-Sperm What are female gametes? Correct Answer-Secondary oocytes Embryonic period? Correct Answer-From fertilization through the eighth week of development Fetal period? Correct Answer-Begins at week 9 and continues on until birth Describe the first trimester? Correct Answer-The first trimester is from conception to 13 weeks. This period is very critical to babies health due to the extensive oran-system development, and baby is most vulnerable to teratogens. Describe the second trimester? Correct Answer-14 weeks to 27 weeks. Baby begins to develop human like features Describe the third trimester? Correct Answer-28 weeks to 40 weeks. Rapid fetal growth, fetus doubles in weight.Cleavage of zygote Correct Answer-Mitotic division after fertilization Day 1: two-cell stage Day 2: four-cell stage