Variation

Question 1

What is intraspecific variation?

Answer 1

Variation within the same species.

Question 2

What is sampling bias?

Answer 2

When the selection process of samples is biased, making unrepresentative (of the population) choices

Question 3

How could chance affect sampling data?

Answer 3

When samples chosen, by pure chance, are not representative of the whole population. E.g the 10 buttercups collected might happen to be the 10 tallest in the whole population

Question 4

What is the best way to prevent sampling bias?

Answer 4

Random sampling - to reduce human involvement as much as possible. By using quadrants after generating random coordinates on a computer.

Question 5

What are ways to remove chance in the sampling process?

Answer 5

• large sample size: reducing probability

- analysis of data collected: determining if chance or variation is the cause of patterns

Question 6

How is genetic variation created?

Answer 6

• mutations
• meiosis: formation of the gametes
• fusion of gametes: which gametes fuses with which

Question 7

How is genetic variation achieved in asexually reproducing organisms?

Answer 7

• only through mutations, because they only reproduce through mitosis (no meiosis)

Question 8

What are some environmental conditions that could effect the growth of an organism?

Answer 8

• climatic conditions: temp, rainfall, sunlight
• soil conditions (pH)
• food availability

Question 9

What variation determined by genetic factors cannot be influenced by environment?

Answer 9

Categoric - e.g blood groups

Question 10

What type of variation is a result of polygenes (more than one gene strand) and the environment?

Answer 10

Continuous variation

Question 11

Give one way the environment can influence the height to which somebody grows?

Answer 11

If diet is good full height, determined by genes, can be reached, but if it is not then person will not grow to full potential height

Question 12

What does a large standard deviation mean?

Answer 12

It means a lot of variety / variation

Question 13

What is standard deviation?

Answer 13

The spread of data either side of the mean

Question 14

What does an overlap in standard deviation show?

Answer 14

That there is no significant difference (between the two things being compared)

Question 15

What is interspecific variation?

Answer 15

When one species differs from another