9. Reproductive Systems

Question 1

Name the 2 modes of reproduction.

Answer 1

Asexual and Sexual

Question 2

What are the three mechanisms involved in asexual reproduction?

Answer 2

Fission, Budding and Fragmentation

Question 3

What does parthenogenesis mean?

Answer 3

Animals that produce offspring via an egg but without fertilisation.

Question 4

How does sexual reproduction lead to genetic variation?

Answer 4

Via fusion of gametes produced by meiosis.

Question 5

Name 3 reproductive strategies that enhance evolutionary fitness in animals.

Answer 5

Synchronised release of gametes, increased chance of fertilisation and allow competition to determine sexual selection.

Question 6

Name the three modes of internal fertilisation.

Answer 6

Oviparous, Viviparous and Ovoviviparous.

Question 7

What animals show oviparous fertilisation and what is the product of the fertilisation?

Answer 7

Spiders, reptiles and birds - eggs are produced.

Question 8

What animals show viviparous fertilisation and what is the product of the fertilisation?

Answer 8

Eutherian placental mammels and marsupials - no egg formed, offspring are birthed.

Question 9

What animals show ovoviviparous fertilisation and what is the product of the fertilisation?

Answer 9

Some fish, lizards and amphibian snakes - egg is formed in body but does hatch outside body.

Question 10

if there is lots of parental care, would you expect a small number or large number of offspring produced?

Answer 10

Small Number