Sexual & Asexual Reproduction — Drills · Grade 7 Science
Chapter: Coordination, Defense & ReproductionWhat these drills covers
By the end of Sexual & Asexual Reproduction you should be able to:
- I can explain sexual & asexual reproduction.
- I can use evidence, a model, and stated assumptions to support a biological explanation.
4 questions, multiple choice, numeric and written answer, each with a worked explanation.
Vocabulary used: reproduction, asexual reproduction, sexual reproduction, fertilization, zygote.
Problem 1
What distinguishes the studied sexual reproduction model?
- Gamete fusion
- Every offspring is identical
- No inherited material
- Only one possible environment
Answer and explanation
Gamete fusion
Sexual reproduction involves gamete fusion; later development and conditions also affect outcomes.
Problem 2
A supplied record has 30 fertilized eggs from 50 eggs. What percent was fertilized?
Answer and explanation
60 %
30/50×100=60%; this does not give later survival.
Problem 3
Does asexual reproduction forbid all variation?
Answer and explanation
No. Mutations and environmental effects can produce differences, even when offspring share much inherited material.
Problem 4
Why is egg count not the same as successful adult offspring?
Answer and explanation
Some eggs may not be fertilized or survive development, and later survival and reproduction depend on conditions.