evolution

Question 1

what is Lamarcks theory

Answer 1

1. a characteristic which is used more and more by an organism becomes bigger and stronger
2. any feature that is improved through use is passed onto its offspring

Question 2

what are evelotionary trees used to represent?

Answer 2

relationships between organisms

Question 3

wgat is natural selection?

Answer 3

individuals in species show a wide range of variation

this is because of their genes

ones with best characteristics and adaptations are more likely to survive and reproduce

Question 4

would a giraffe with a longer neck survive longer than one with a small neck?

Answer 4

yes because it would be able to reach all the food that the small one wouldn’t be able to and then would be able to reproduce

Question 5

give an example of a mutation

Answer 5

camouflage on the peppered moths

Question 6

do microorganism such as bacteria and viruses spread quickly or slowly

Answer 6

they spread very rapidly because they can evolve in a relatively short time

Question 7

can bacteria become resistant to an antibiotic

Answer 7

yes and when the antibiotic is around the ones that are immune have an advantage over the ones that are not

Question 8

how many chromosomes are in a normal human being

Answer 8

46 (23 pairs)

Question 9

examples of environmental variation

Answer 9

climate
diet
accidents
culture
lifestyle

e.g if you eat too much you become heavier and fatter

Question 10

what is the fusion of gametes called

Answer 10

fertilisation

Question 11

how many parents does asexual reproduction need ?

Answer 11

1!

Question 12

who is famous for the theory of evolution

Answer 12

Charles Darwin