KS3 Genetics and Evolution

Question 1

Environmental variation is caused:

Accepted Answer

By environmental factors.

Question 2

What does natural selection allow?

Accepted Answer

Species to adapt to changes in there environment

Question 3

Why do species become extinct ? (Select two)

Accepted Answer

Reduction in available haitat, New predator

Question 4

Are a boy and a girl the same species ?

Accepted Answer

Yes

Question 5

Which of the following are the same species ?

Accepted Answer

Cats

Question 6

What is a gene bank used for?

Accepted Answer

To preserve genetic material for the future

Question 7

When there is plenty of food, what will happen to the number of birds with shorter beaks?

Accepted Answer

It will not change.

Question 8

Which of the following species is extinct?

Accepted Answer

Dodo

Question 9

Where is genetic information found in the cells ?

Accepted Answer

Nucleus

Question 10

The structure of DNA was worked out by:

Accepted Answer

Watson and Crick

Question 11

A characteristic of any species with a limited number of possible values is which variation?

Accepted Answer

Discontinuous

Question 12

Which two of the following are sex cells ?

Accepted Answer

Sperm, Egg

Question 13

Highlight 3 inherited characteristics which are selective advantages

Accepted Answer

Resist disease, Compete strongly for food, Avoid predators

Question 14

What are two advantages of selective breeding ?

Accepted Answer

Disease resistant, Increased yield

Question 15

What is the structure of DNA ?

Accepted Answer

A double Helix

Question 16

Which of the following best describes selective breeding ?

Accepted Answer

Breeding organisms to enhance/get a certain characteristic

Question 17

A human liver cell has 46 chromosomes. So a human egg cell has ........ chromosomes

Accepted Answer

23

Question 18

What is a gene pool?

Accepted Answer

Variations in genes within the same species

Question 19

What did Watson and Crick discover in 1953?

Accepted Answer

DNA structure

Question 20

Some species are able to evolve more quickly, select two reasons why?

Accepted Answer

Higher genetic diversity in species, Larger population

Question 21

Inherited characteristics in humans are caused by:

Accepted Answer

genetic information

Question 22

What is smaller than a cell? (Select two)

Accepted Answer

Chromosomes, DNA

Question 23

Evolution is:

Accepted Answer

a gradual change in an organisms characteristics over time.

Question 24

Each chromosome contains one molecule of which substance?

Accepted Answer

DNA

Question 25

Why is having a large biodiversity within a species important ?

Accepted Answer

Allows population to be adaptable to changes

Question 26

Which scientist first proposed the theory of natural selection?

Accepted Answer

Darwins

Question 27

Which is the best example of an environmental variation?

Accepted Answer

a suntan

Question 28

"Having as wide a range of different species in an ecosystem as possible" - Is known as?

Accepted Answer

Biodiversity

Question 29

Select two continuous variations?

Accepted Answer

Height, Foot length

Question 30

Are a lion and a tiger the same species ?

Accepted Answer

No

Question 31

Genetic information can be found in a sperm cell in the:

Accepted Answer

nucleus.

Question 32

What can organisms of the same species do ?

Accepted Answer

Produce fertile offspring

Question 33

Which kind of variations graphical representation is a bar chart ?

Accepted Answer

Discontinuous

Question 34

What is the name for changes in organisms over long periods of time?

Accepted Answer

Evolution

Question 35

How many chromosomes does a sex cell contain ?

Accepted Answer

23

Question 36

The theory of evolution that most scientists believe today was put forward by:

Accepted Answer

Wallace and Darwin.

Question 37

Which is least likely to cause the endangerment of a species?

Accepted Answer

decrease in predators

Question 38

Which of these is not an inherited various?

Accepted Answer

Scar on knee

Question 39

This birds prey is buried in the sand. Different beak sizes in the population are caused by:

Accepted Answer

genes.

Question 40

A gene is:

Accepted Answer

A short section DNA

Question 41

Variation is:

Accepted Answer

differences in characteristics.

Question 42

What can ultimately occur if species do not change?

Accepted Answer

Extinction

Question 43

Do different species have a different number of chromosomes ?

Accepted Answer

Yes

Question 44

How many chromosomes does a normal cell have?

Accepted Answer

23 pairs

Question 45

Which feature of this animal suggests that it is prey for larger animals?

Accepted Answer

spines on its body

Question 46

Which is the best example of an inherited variation?

Accepted Answer

eye colour

Question 47

What material makes up a gene?

Accepted Answer

DNA

Question 48

Who was the first person to get an X-ray picture of the structure of DNA ?

Accepted Answer

Franklin

Question 49

What sort of variation does this chart show?

Accepted Answer

continuous

KS3 Genetics and Evolution

Questions 49

KS3 Genetics and Evolution

Questions 49