excretion in a body Flashcards
1
Q
what is excretion
A
getting rid of waste materials that have been part of the body
2
Q
what is urea
A
a waste substance made in liver cells from unwanted proteins
3
Q
what do we excrete (3 eg)
A
carbon dioxide
urea
excess water
4
Q
why are magnesium ions good for plants?
A
it helps make chlorophyll for the plants
5
Q
why are nitrate ions good for plants?
A
it nitrate makes protein for the plant
6
Q
diffusion definition
A
movement of particles from a area of high concentration to an area of low concentration
7
Q
how dose the water get into the plant
A
Plants absorb water from the soil by a process called osmosis
Water in the soil is absorbed by the roots and travels through the stems to the leaves.
8
Q
A
