Studying fossils of organisms from the past allows scientists to see how the characteristics of species slowly become more complicated over time.
Required
6
What is a fossil?
The mineralized remains of an organism
The bones of a dead organism
The dead body of an organism
What is variation?
Small differences between members of a species
Similarities between different species
Large differences between members of a species
Differences between different species
What is the genome of an organism?
The genetic material from an organisms mother
The genetic material from an organisms father
All the genetic information in an organism
Where does the genome of an organism come from?
Its mother only
Develops as the organism grows
Its father only
Both its biological parents
What characteristics can be inherited?
Characteristics caused by the environment only
Characteristics learnt from others
Genetic and environmental characteristics
Genetic characteristics only
Can an organism genetically inherit characteristics their parents have learnt?
Yes
No
Sometimes
Occasionally
What part of an animal or plant cell contains genetic information?
Nucleus
Cytoplasm
Cell membrane
Chloroplast
Describe the structure of DNA
Singlehelix
Double helix
Single ladder
Double ladder
What chemical substances stores genetic information?
DNA
Membranes
Oxygen
Glucose
Is it possible to extract the DNA from an organism?
Yes
No
Question 11
11.
Question 12
12.
What can “infertile” offspring NOT do?
Question 13
13.
Explain why members of a species show variation.
Question 14
14.
Choose the correct option for each definition.
Continuous variation – things that __________values.
Discrete variation – things that __________values.
Question 15
15.
This question is about investigating variation in a species.
A biologist wanted to find out whether taller lavender plants were wider than shorter lavender plants. The plants are usually between 30-80cm in height and width.
Question 16
16.
What two measurement would they need to take?
Question 17
17.
What piece of equipment could they use to take this measurement?
Question 18
18.
The biologist sampled data from 12 plants and produced this scatter graph:
What conclusion can the biologist make from their results?
Question 19
19.
What could they have to do to improve the evidence for their conclusion?
Question 20
20.
The Biologist carried out a different experiment and produced the following results:
Use the table to plot the remaining points on the graph.
Use the straight line tool to draw a line of best fit through your points.
Question 21
21.
Describe the correlation shown by the graph.
Question 22
22.
Explain how the fossil record gives us evidence that species have changed over time.
Include:
- How fossils are formed from dead organisms
- How scientists can work out the age of a fossil
- How the characteristics of more recent fossils compare to older ones
What is a species?
A group of organisms that can reproduce
A group of organisms that can produce fertile offspring
A group of organisms that can produce infertile offspring
A group of organisms that share characteristics
Sort the examples of variation into examples that are continuous or discrete.