SUMMARY QUESTIONS

Question 1

name the 4 general things that need to be exchanged between organisms and their environment

Question 2

calculate the surface area to volume ratio of a cube that has sides 10mm long

Question 3

name 3 factors that affect the rate of diffusion of substances into cells

Question 4

name the process by which CO2 is removed from a single-celled organism

Question 5

Explain why there’s a conflict in terrestrial insects between gas exchange and conserving water

Question 6

Explain how the tracheal system limits the size of insects

Question 7

In relation to fish gills, describe what is meant by counter current flow

Question 8

Outline why counter current flow is an efficient means of exchanging gases across the gills of fish

Question 9

Mackerel are active, fast-swimming fish while Plaice spend most of their lives moving slowly on the sea bed. There are differences in the gills of these 2 types of fish. Suggest what these differences might be

Question 10

water flow over fish gills is one-way whereas the flow of air in and out of the lungs us two-way. Suggest why one-way flow is an advantage to fish

Question 11

State 2 similarities between gas exchange in a plant leaf and gas exchange in a terrestrial insect

Question 12

state 2 differences between gas exchange in a plant leaf and gas exchange in a terrestrial insect

Question 13

Explain the advantage to a plant being able to control the opening and closing of stomata

Question 14

Insects and plants face the same problems when it comes to living on land. what is the main problem they share

Question 15

State one modification to reduce water loss that is shared by plants and insects