week 14 Reproduction

Question 1

How many organisms are needed for asexual reproduction?

Answer 1

one

Question 2

In general, how many organisms are
needed for sexual reproduction to occur?

Answer 2

two

Question 3

What is a pro and con of both sexual and asexual? Can some species do either, depending on the environment?

Answer 3

Asexual:
Pro:Saves time and energy not to look for mate
Cons:Do not have genetic diversity for adapting to a new environment
Sexual:
Pros: genetic variability in off spring
Good for adaptation + survival of the species
Cons:Takes time and energy to find a mate
Need to have some body complexity organelles

yes

Question 4

What are 3 types of asexual reproduction mentioned in class?

Answer 4

binary fission, parthenogenesis, budding

Question 5

In the video of the stingray who had a “virgin birth,” that type of asexual reproduction is known
as what?

Answer 5

charlotte the stingray
Parthenogenisis

Question 6

What are the 2 main categories of fertilization for sexual reproduction? How did we explain
them in class? Which one generally involves many more eggs, and why?

Answer 6

external and internal. External lays more eggs because of a higher risk of not surviving.

Question 7

Reproductive cells are also known as __g______________. Female gametes are eggs; male
gametes are sperm. Mature eggs and sperm form during the process of meiosis/mitosis

Answer 7

gametes. Meiosis

Question 8

Organs involved in sexual reproduction that create gametes (either ovaries or testes) in many
species are known as __g_________________

Answer 8

gonads

Question 9

What do the following terms mean: oviparous, ovoviviparous, viviparous? What are examples
of species in each category?

Answer 9

egg outside of body
Egg hatches inside females body then comes out of the female
live birth

chickens
stingray
horse

Question 10

What does “spawning” mean when referring to sexual reproduction? Is this an example of external or internal fertilization? What are at least 3 examples of animals who spawn?

Answer 10

to release or lay eggs and have them get fertilized
fish, toads, frogs

Question 11

What does “amplexus” mean when referring to sexual reproduction? Did this happen during
internal or external fertilization? What species was performing amplexus in the video?

Answer 11

mating posture. external fertilization. Toads

Question 12

What was the term for dormancy of an embryo in the womb of the kangaroo until it’s current
joey had grown enough to leave the pouch?

Answer 12

embryonic diapause