Photo AI
In some frog species, during mating, the male climbs onto the back of the female and grips her with his front legs - NSC Life Sciences - Question 2 - 2023 - Paper 1
Question 2
In some frog species, during mating, the male climbs onto the back of the female and grips her with his front legs. During this time, the female will release about 6... show full transcript
Worked Solution & Example Answer:In some frog species, during mating, the male climbs onto the back of the female and grips her with his front legs - NSC Life Sciences - Question 2 - 2023 - Paper 1
Step 1
Step 2
2.1.2 Explain why the fertilised eggs of these frogs do not survive on land.
Answer
The fertilised eggs do not survive on land primarily because they are laid in water, where they can dry out. Additionally, these eggs lack protective shells and are not amniotic, which makes them vulnerable to environmental conditions.
Step 3
2.1.3 Explain how amplexus increases the chances of fertilisation in frogs.
Answer
Amplexus increases the chances of fertilisation by allowing the male and female frogs to be in close proximity during the egg-laying process. This positioning ensures that as the female releases her eggs, the male is simultaneously releasing sperm over them, maximizing the likelihood of sperm encountering the eggs.
Step 4
2.1.4 From the information above, explain ONE other strategy that contributes to the reproductive success of the frog species.
Answer
One other strategy that contributes to the reproductive success of frog species is the high number of eggs released. By releasing approximately 6 000 ova at once, it increases the chances that some will survive despite predation and environmental hardships.