MEDIUM
Lower Secondary Stage 9
IMPORTANT
Earn 100

What are the two causes of variation?

Important Questions on Variation and Inheritance

HARD
Lower Secondary Stage 9
IMPORTANT
Cambridge Lower Secondary Science Stage 9: Student's Book>Chapter 4 - Variation and Inheritance>End of Chapter Review>Q 7
Design a classification key that could be used to identify the following invertebrates:
Worms, spiders, snails, ladybugs, slugs, ants.
MEDIUM
Lower Secondary Stage 9
IMPORTANT
Cambridge Lower Secondary Science Stage 9: Student's Book>Chapter 4 - Variation and Inheritance>End of Chapter Review>Q 8
A normal human body cell contains 46 chromosomes in the nucleus. However, a sperm cell contains only 23. Explain why this is the case.
MEDIUM
Lower Secondary Stage 9
IMPORTANT
Cambridge Lower Secondary Science Stage 9: Student's Book>Chapter 4 - Variation and Inheritance>End of Chapter Review>Q 8
Explain how a person could inherit a characteristic, such as 'earlobe attachment', from her mother.
MEDIUM
Lower Secondary Stage 9
IMPORTANT
Cambridge Lower Secondary Science Stage 9: Student's Book>Chapter 4 - Variation and Inheritance>End of Chapter Review>Q 9
Why did Watson and Crick need to rely on work of other scientists to develop their model of the structure of DNA?
MEDIUM
Lower Secondary Stage 9
IMPORTANT
Cambridge Lower Secondary Science Stage 9: Student's Book>Chapter 4 - Variation and Inheritance>End of Chapter Review>Q 9
Write a sentence that includes and explain the terms 'DNA', 'chromosome' and 'gene'.
EASY
Lower Secondary Stage 9
IMPORTANT
Cambridge Lower Secondary Science Stage 9: Student's Book>Chapter 4 - Variation and Inheritance>End of Chapter Review>Q 10
Explain the term 'variation'.
MEDIUM
Lower Secondary Stage 9
IMPORTANT
Cambridge Lower Secondary Science Stage 9: Student's Book>Chapter 4 - Variation and Inheritance>End of Chapter Review>Q 10
Give an example of variation within a species.
HARD
Lower Secondary Stage 9
IMPORTANT
Cambridge Lower Secondary Science Stage 9: Student's Book>Chapter 4 - Variation and Inheritance>End of Chapter Review>Q 10

Question Image

Look at figure 4.28, which shows plum trees growing in Taiwan. Give one characteristic of the trees caused by the environment, one characteristic caused by their genetic material and one characteristic caused by both the environment and the genetic material.