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The typical end product of cleavage is a _______________. a. zygote b. blastula c. gastrula d. gamete

Is this statement true or false? Materials are randomly distributed in egg cytoplasm, so cleavage parcels out same kinds of cytoplasmic components to all cells.

Cells differentiate as a direct result of ______________. a. selective gene expression b. morphogenesis c. gastrulation d. all of the above

_______________ help bring about morphogenesis. a. Cell migrations b. Changes in cell shape c. Cell suicide d. all of the above

Match each term with the most suitable description. _____________ apoptosis _____________ embryonic induction _____________ cleavage _____________ gastrulation _____________ pattern formation a. blastomeres form b. cellular rearrangements form primary tissues c. cells die on cue d. cells influence neighbors e. tissues, organs emerge in the correct places

A ________________ implants in the lining of the human uterus. a. zygote b. gastrula c. blastocyst d. fetus

The _______________, a fluid-filled sac, surrounds and protects an embryo and keeps it from drying out. a. amnion b. allantois c. yolk sac d. chorion

At full term, a placenta _______________. a. is composed of extraembryonic membranes alone b. directly connects maternal and fetal blood vessels c. keeps maternal and fetal blood vessels separated

During the second trimester of pregnancy, _______________. a. gastrulation ends b. eyes open c. heartbeats start

____________ stimulates milk synthesis in mammary glands. a. HCG b. Prolactin c. Testosterone d. Oxytocin