Science, Bio - Plants, Variation & Classification Flashcards
1
Q
characteristic
A
- feature of an organism
e.g. hair colour, blood group
2
Q
variation
A
- difference in our characteristics
3
Q
genetic variation
A
- passed down from parents
- genes
- half from mom half dad
eg. eye colour, hair colour
4
Q
environmental variation
A
- determined by how we live / choices we make
eg. what we eat, where we live
5
Q
types of variation
A
- interspecific variation - between species
- intraspecific variation - within species
6
Q
continuous variation
A
- no distinct categories
- no limit on the value
- quantitative
e.g. height, weight, heart rate
7
Q
discontinuous variation
A
- distinct categories
- no in-between categories
- qualitative
8
Q
species
A
- group of organisms
- share the same characteristics
9
Q
importance of water for plants
A
- germination of seeds
- photosynthesis
- transport nutrients and minerals
- maintenance of the plant structure (apply pressure)
- provides a habitat
10
Q
minerals plants need
A
- nitrogen (nitrate)
- phosphorus (phosphates)
- potassium (potassium ions)
- magnesium (magnesium ions)
11
Q
why do they need these minerals
A
- control chemical activies
- grow
- produce materials
12
Q
transpiration
A
- process of water removed from a plant
starts at soil => goes into root hair cell by osmosis => water is not in roots => water travels up stem thru xylem => water gets thru leaf => evaporates out of leaf holes (stomata)
13
Q
glucose
A
- plants food
- help plants grow
- absorb nutrients from soil
14
Q
photosynthesis formula
A
carbon dioxide + water -> glucose + oxygen
15
Q
classification system
A
- plants
- animals
- fungi
- bacteria
- protoctists
