9A

Question 1

What is environmental variation

Answer 1

the ability of an organism to alter its Dna depending upon environmental conditions.

Question 2

Examples of environmental variation

Answer 2

Hair length - what length you choose to have your hair. Scars - caused by accidents personal to you. Muscle strength

Question 3

How is environmental variation caused

Answer 3

climate, diet, accidents

Question 4

Examples of discontinuous variation

Answer 4

Blood group

Question 5

Continous variation

Answer 5

it ranges from the shortest to the tallest and any height in between both environmental and inherited variation

Question 6

Discontinous variation

Answer 6

Describes characteristics that can only be one of a number of limited options, usually inherited

Question 7

What is inherited variation

Answer 7

is a result of genetic information from the parents when they get half of their DNA and inherited features from each parent

Question 8

Examples of inherited variation

Answer 8

eye color, height,skin color

Question 9

How is inherited variation caused

Answer 9

variation is caused by parents mating and then passing on dna from parents to offspring

Question 10

Where is genetic information stored

Answer 10

In dna molecules

Question 11

What does genetic information do?

Answer 11

Provides instructions or code to make proteins which provide characteristics

Question 12

What is normal distribution

Answer 12

which most values cluster in the middle of the range and the rest taper off symmetrically towards the sides

Question 13

What are chromosomes made of

Answer 13

A chromosome is made up of proteins and DNA organized into genes.

Question 14

Number of pairs in most human cells

Answer 14

23

Question 15

Where are genes found?

Answer 15

In chromosomes

Question 16

What do genes do

Answer 16

carry the information that determines your traits inherited from your parents

Question 17

What roles did watson,crick,franklin and wilkins play in the structure of dna

Answer 17

Franklin - photos of dna with xrays
Watson - helped build double helix model
Wilkins - spent years testing the double helix model
Crick - recognized the shape spiral molecules on xray photos

Question 18

How can changes in the ecosystem cause endagerment or exintion

Answer 18

Changed in physical environmental factors,competition from others and human activities

Question 19

Methods of conservation of animals

Answer 19

banning the hunting of certain animals,setting up nature reserves and starting breeding programs

Question 20

How can adaptations affect the chances if survival in a habitat

Answer 20

Adaptations like polar bears having white fur helps them camaflouge and for warmth and the black skin for absorbing heat

Question 21

Why is preserving biodiversity important

Answer 21

A wide variety of species will cope better with threats than a limited number of them in large populations.

Question 22

Role of gene banks

Answer 22

gene banks are used to store and conserve the plant genetic resources of major crop plants and their crop wild relatives.

Question 23

How can natural selection lead to evolution

Answer 23

Organisms that are more adapted to their environment are more likely to survive and pass on the genes that aided their success

Question 24

Examples of continous variation

Answer 24

Height,foot length,hand span

Question 25

Examples of discontinous variation

Answer 25

Gender,eye colour,blood type

Question 26

Where is continous variation plotted

Answer 26

On a normal distribution curve