M5: Reproduction in Animals

Question 1

Why is reproduction important?

Answer 1

• continuity of a species
• survival

Question 2

what is sexual reproduction?

Answer 2

union of male and female gametes as a result of meiosis

Question 3

what is a haploid?

Answer 3

reproductive cells that contain one set of chromosomes

Question 4

what is external fertilisation?

Answer 4

male sperm fertilises egg outside of body

Question 5

examples of external fertilisation?

Answer 5

• usually aquatic and amphibians
• Salman, bony fish

Question 6

advantages and disadvantages of external fertilisation?

Answer 6

advantages > occurs more rapidly,
less energy is required

disadvantages > Gametes can be exposed to environmental conditions, predators and disease, and less direct method

Question 7

what is internal fertilisation?

Answer 7

direct male gametes into a female body

Question 8

examples of internal fertilisation?

Answer 8

mammals and birds

Question 9

advantages and disadvantages of internal fertilisation?

Answer 9

advantages > more likely to be successful due to the proximity of organisms requiring fewer gametes to be produced
more direct tract

disadvantages > more energy, more time, and need to provide parental care