test 4

Question 1

explain how being large helps the penguin to survive at very low temperature

Answer 1

they have a small surface to volume ration so less heat is transferred

Question 2

thick layer of fat and downy features suggest how these features help penguins to survive

Answer 2

helps to trap air

so there is less hear transferred

Question 3

describe the response of roots to gravity and explain how this response benefits the plant

Answer 3

positively geotropic
stables the plant
obtains water

Question 4

what happen at the glomerus

Answer 4

ultrafiltration

Question 5

describe how the blood leaving the glomerus will differ from blood entering the glomerulus

Answer 5

less glucose 
less water 
fewer amino acids 
less urea 
fewer ions

Question 6

what is meant by the term selective absorption

Answer 6

some substances are reabsorbed into the blood

Question 7

suggest a reason for the difference in sensitivity between the areas of the skin

Answer 7

receptors are closer together and to the skin surface