FACTORS AFFECTING LIFE PROCESSES

Question 1

name the three factors that affect life processes

Answer 1

temperature, light intensity, and concentration of reactants

Question 2

what effect does temperature have on life processes?

Answer 2

enzymes work at optimum temp, if slowed down the life processes is slower, if too hot, it’ll be denatured meaning it can’t function anymore.

Question 3

what effect does light intensity have on life processes?

Answer 3

if its brighter - photosynthesis rate is faster, but eventually at a point it wont help because another factor (like water) will limit the factor - there will not be enough of it for that rate to get faster

Question 4

what effect does the concentration of reactants have on life processes?

Answer 4

in photosynthesis, when theres more water or carbon dioxide photosynthesis increases however at some point adding more of one wont help bc smth else will become limited.

Question 5

why do some type of cells need more mitochondria than other cells?

Answer 5

some cells have more need for energy and so need to carry out more respiration

Question 6

why do plant cells have chloroplasts and cell walls but animal cells dont?

Answer 6

animals don’t carry out photosynthesis, plus animals move around and so need to be flexible, while plants need to be more rigid.

Question 7

why are root hair cells long and thin?

Answer 7

This gives them more surface area so that they can absorb water by osmosis more efficiently