biology - plants and their environment Flashcards
1
Q
what are factors that affect enzyme activity?
A
- temperature
- pH
- substrate and enzyme concentration
2
Q
what are the envirmonmental importances of plants?
A
- they are habitals
- they produce oxygem
- they help regulate the climate
- they give us resources (e.g fruit and veg, gum, rubber wood and paper)
3
Q
how do plants produce and grow?
A
- pollen is transferred by insects, birds or the wind
- the pollen tube opens, where the pollen moves down and fertilises the egg, turning it into a seed
- the plant ovary swells to support the seed
4
Q
what factors affect the growth of plants?
A
- soil, pH and aeration
- temperature
- light intensity
- human effects (trampling, pollution, deforestation)
- mineral ions
- competition
5
Q
limiting factor?
A
a factor that limits the rate of a reaction
6
Q
biodiversity
A
the variety of life in a particular habitat
7
Q
habitat
A
a place with suitable conditions for a variety of different plants and animals to live in
8
Q
photosynthesis
A
the process by which plants make food using carbon dioxde, water and light energy
9
Q
aeration
A
the process which air is circulated/mixed/dissolved through a liquid or substance
10
Q
transpiration
A
the evaporation of water from the surface of the levels of plants
11
Q
chlorophyll
A
the natural cimpound that gives plant their green colour
