Oviparity vs Viviparity Flashcards

You may prefer our related Brainscape-certified flashcards:
1
Q

What is the basic composition of terrestrial oviparious animals’ eggs?

A

outer layer - calcium carbonate, 2 soft membranes
inside egg - air cell, yolk

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

What is a hard shell covered with which allows for diffusion?

A

thousands of pores

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

As the incubation of an egg progresses, oxygen level ____ as carbon dioxide levels ____.

A

decrease; increase

via lost water vapor

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Why are eggs laid in thick vegetation much thinner than those laid in open areas?

A

it helps to keep the fetus protected and prevents much water loss

Ex. Mound builders of Australia

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Which kind of organisms retain the fetus within the mother until birth and gives birth to live young?

A

viviparous

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

What are some examples of viviparous organisms?

A

mammals

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

What kind of organisms retain the egg within the body, but the mother gives live birth?

A

ovoviviparous

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

What are some examples of ovoviviparous organisms?

A

sharks (20%)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

What is an advantage to ovoviviparity?

A

the young are better developed after birth

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

What is a disadvantage to ovoviviparity?

A

the mother has a lot of strain carrying fully shelled eggs

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

What kind of organisms are mammals but also lay eggs?

A

monotremes

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Which kind of organisms have a uterus that holds the embryo, and are born in very early stages where the fetus crawls into a pouch where it completes it’s development?

A

marsupials

their pouch is called a marsupium

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

What are some examples of marsupials?

A

kangaroos and opossums

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

What kind of organisms have placental embryos where the placenta links the blood supply between the embryo and the mother?

A

eutherian mammals

How well did you know this?
1
Not at all
2
3
4
5
Perfectly