Final exam

Question 1

what animals have unpaired ovaries

Answer 1

hagfish, birds, bats

Question 2

how are eggs produced?

Answer 2

oocytes produce eggs, develop into follicles

Question 3

what is ovulation?

Answer 3

when the egg is released into the coelem

Question 4

what happens to the ovaries after breeding?

Answer 4

they shrink (EXCEPT IN PLACENTALS)

Question 5

what are oviducts?

Answer 5

muscular and glandular ducts with an ostium (opening) and an infundibulum (“funnel”) that end at the cloaca

Question 6

describe the shark oviduct

Answer 6

have large eggs called ovum
single ostium

Question 7

what is the shell gland in shark oviducts?

Answer 7

secretes albumin (egg white [protein and water])

Question 8

what is the yolk in a shark?

Answer 8

egg cell (ovum) and lipids

Question 9

do sharks have a uterus?

Answer 9

yes, they are a few viviparous species?

Question 10

what does viviparous mean?

Answer 10

giving birth to live young that developed inside the mothers body

Question 11

what is the leathery shell that sometimes surrounds shark eggs?

Answer 11

mermaid’s purse

Question 12

what do the oviducts look like in derived bony fish?

Answer 12

ovarian cavity is continuous with oviduct
carried directly to genital pore
no cloaca

Question 13

describe amphibian oviducts

Answer 13

secrete jelly like layer around eggs
have ovisacs

Question 14

what is the benefit of the jelly layer around amphibians eggs

Answer 14

prevent desiccation

Question 15

what are ovisacs and what do they do?

Answer 15

caudal expansion of oviduct to store eggs
allows to hold eggs until water and temperature conditions are right