Sexual reproduction requires the cellular process of __________ followed by __________.
A. mitosis ... gamete formation
B. mitosis ... fertilization
C. mitosis ... meiosis
D. meiosis ... fertilization
D. meiosis ... fertilization
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What is a spermatheca?
a. a common body opening for the digestive, excretory, and reproductive systems b. an articulated appendage that functions to manipulate sperm and eggs for fertilization c. a specialized sac utilized by insects for long-term storage of sperm for later fertilization d. a stone or other surface to which fish adhere clusters of eggs using natural protein glues
What is the main role of human chorionic gonadotropin?
A. It stimulates the release of oxytocin from the mother's pituitary. B. It allows the mother to realize she is pregnant, via pregnancy tests. C. It is similar to FSH in stimulating follicle development. D. It maintains the corpus luteum.
Intact skin and body-cavity linings are the first barriers to invasion by pathogens
1.True 2.False
Describe the evolutionary relationships between the following organisms. Draw a family "tree" if necessary. Include
bony fish, amniotes, lizards, mammals, turtles, birds, reptiles, ray-finned fishes, amphibians, lungfish, and lobe-finned fishes. What will be an ideal response?