ecostystems 2 exam questions

Question 1

fill in the blanks:
Suzies muscle cells 1) ___ at a faster rate to transfer more energy. her muscles need to be supplied with 2) ___ and 3) ___ more quickly. Her heart beats faster to increase the flow of 4)___ which carries the
products 5)____ and 6) ____ away from her muscles

Answer 1

1) respire
2) glucose
3) oxygen
4) blood
5) carbon dioxide
6) water

Question 2

complete word equation for aerobic respiration

1)_____ + glucose = carbon dioxide + 2)____

Answer 2

1) Oxygen

2) water

Question 3

state where respiration occurs in a cell

Answer 3

mitochondria

Question 4

describe 2 differences between aerobic and anaerobic respiration

Answer 4

1. Aerobic makes much more energy than anaerobic

2. Anaerobic makes lactic acid, whereas Aerobic doesnt

Question 5

state and explain a situation where a mouse would use anaerobic respiration

Answer 5

A mouse would use anaerobic respiration if the mouse was chased by the predator the mouse would have to run faster than usual and use anaerobic respiration

Question 6

state one reason why a mouse cannot respire anaerobically for a long period of time

Answer 6

because during anaerobic respiration you don’t use oxygen , but instead you produce a lot more lactic acid which means it will soon cause a muscle ache. respiration cant be done for a long time

Question 7

state 2 adaptions of the palisade layer

Answer 7

the palisade layer has more liquid so that less water evaporates because in the palisade layer is the chloropolasts in which photosynthesis happens. cells are tightly packed together to maximise the amount of light absorbed

Question 8

explain how yeast can be used in food production

Answer 8

ethanol product can be use din alcoholic drink , carbon dioxide is used in bread to make dough rise