Year 9 Science • AC9S9U02 • Authored homework
Reproductive systems, gametes and reproduction
Describe the structure and function of reproductive cells and organs in plants and animals, and analyse how sexual and asexual reproduction support species survival. Use topic vocabulary, evidence and clear cause-and-effect reasoning in longer answers.
Part A
Short-answer questions
Define gamete and give one animal example and one plant example.
Describe one structural feature of sperm that helps its function.
Describe one structural feature of an egg cell that helps its function.
What is fertilisation?
What is the difference between sexual and asexual reproduction?
Name one plant structure involved in sexual reproduction and state its function.
Explain why offspring from sexual reproduction are usually genetically varied.
Give one advantage of asexual reproduction in a stable environment.
Give one disadvantage of asexual reproduction in a changing environment.
Correct this misconception: “All reproduction requires two parents.”
Part B
Long-answer questions
Compare sexual and asexual reproduction using number of parents, gametes, genetic variation, speed and environmental advantage.
Explain how the structure of sperm and egg cells relates to their roles in fertilisation.
Describe how flowering plants use pollen, ovules and seeds in sexual reproduction.
Analyse why genetic variation can help a species survive when the environment changes.
A population reproduces asexually very quickly. Explain one advantage and one risk for long-term survival.
Use a table to compare animal reproductive organs or plant reproductive structures and their functions.
Explain how pollination and fertilisation are different but connected in flowering plants.
Evaluate whether sexual reproduction or asexual reproduction is more useful in a rapidly changing environment.
Create a life-cycle diagram for a plant or animal and explain where gametes and fertilisation occur.
Write a full response explaining how reproductive cells, reproductive organs and reproduction type contribute to survival of a species.
Part C
Research and understanding task
Research one organism that can reproduce asexually, or one flowering plant with a specialised pollination method. Explain how the reproduction method works and what advantages or trade-offs it provides.