surface area to volume ratio wrong answers

Question 1

Q2. (b) Suggest how the environmental conditions have resulted in adaptations of
systems using Model A rather than Model B.

Answer 1

Water has lower oxygen partial pressure so the system on the outside reduces the diffusion distance between water and blood.

Question 2

Q4 (d) Mammals such as a mouse and a horse are able to maintain a constant
body temperature.
Use your knowledge of surface area to volume ratio to explain the higher
metabolic rate of a mouse compared to a horse

Answer 2

A mouse will have a larger surface area to volume ratio as it it smaller so there will also be a faster heat loss. This will lead to a faster rate of respiration to release heat to maintain a constant body temperature.

Question 3

Q4. The scientist decided to use the ratio of surface area to mass, rather than
the ratio of surface area to volume. He made this decision for practical
reasons.
Suggest one practical advantage of measuring the masses of frog eggs,
tadpoles and adults, compared with measuring their volumes.

Answer 3

Its more easier to find mass as because of the irregular shapes.

Question 4

(f) A student who looked at these results said that they could not make a
conclusion about the relationship between stage of development and
metabolic rate.
Use information in the table to explain reasons why they were unable to
make a conclusion

Answer 4

There is no information about the egg so it cant be compared. There is also no statistical information to support for evidence;