Module 5 - Heredity

Question 1

What is pollination?

Answer 1

The transfer of pollen to a stigma, ovule, flower, or plant to allow fertilization.

Question 2

Is pollination sexual or asexual reproduction? List the 2 main categories.

Answer 2

It can be either. Pollination occurs through either cross pollination (sexual) or self pollination (asexual).

Question 3

What are the 4 types of pollination?

Answer 3

Wind pollination, bird pollination, insect pollination and pollination by other animals.

Question 4

List the 4 types of asexual reproduction.

Answer 4

Binary fission, budding, spores and fragmentation.

Question 5

What is binary fission? What microbes reproduce via binary fission?

Answer 5

The parent cell grows and then splits down the middle to form 2 identical daughter cells. This can occur very rapidly in the right conditions. Bacteria, protists and some algae/fungi reproduce through fission.

Question 6

What is external fertilisation? List a way in which this occurs.

Answer 6

It is fertilisation that occurs outside the body. Corals, for example, release large amounts of gametes at the same time into the water in the hopes that some are fertilised.

Question 7

What is internal fertilisation? List a way in which this occurs.

Answer 7

Fertilisation that occurs inside the body. E.g. reptiles: Most fertilise their eggs internally and then deposit them outside the mother’s body for development.

Question 8

Give some disadvantages of external fertilisation.

Answer 8

Dehydration is not a risk and fewer eggs are required for a successful number of surviving offspring (higher chance of fertilisation).