Evolution

Question 1

Evolution in present times:

RESISTANCE TO ANTIRETROVIRALS IN HI-VIRUSES

Answer 1

1. some of the viruses develop mutations that make them resistant to the ARV drugs. This introduces variation in the population
2. The application of ARV’s changes the environment and acts as a selection pressure.
3. The mutant, resistant viruses selected, survive the treatment and multiply, passing on the mutant gene to their offspring.
4. A drug-resistant virus population develops.

Question 2

Advantages of Bipedalism

Answer 2

upright bodies expose a smaller surface area to the sun which reduces the risk of overheating while hunting, foraging and escaping predators

Hands are free to use tools, prepare food, carry young

Vision extends further over the tall grass to find food or avoid predators

Question 3

Describing evolution

Answer 3

There was alot of variation in the (watever example used)

Wat was the variation described?

Only some survived as they were better suited (state who survived and which died out) and why this happened

State in detail why the one species survived

That favorable characteristic of (something) was passed to their offspring

And eventually there was a greater population of (that species)

Question 4

When explaining bipedalism

Answer 4

Always state how the change assisted with the transition to bipedalism

E.g the for men magnum has moved to base of the skull
SO THAT the head can be held vertically

Question 5

State what is the Out of Africa Hypothesis

Answer 5

Modern!!! Important to say MODERN humans originated in Africa and then migrated to other continents

Question 6

Genera to be bipedal but did not use fire

Answer 6

Australopithecus

Aedipithecus