Food, medicine, clothing, construction, transportation etc.
100
What is the difference between a fibrous root and a taproot?
Fibrous roots are shallow with lots of fine hairs, whereas a taproot has one main root with others branching off. The main root goes deep in the soil.
100
What is selective breeding?
Selective breeding means that people choose specific plants with particular characteristics and encourage these plants to reproduce.
100
Name 2 positives and 2 negatives of using greenhouse to grow crops.
Positive - control temp, control water, start earlier in year
Negative - expensive to build, expensive to run, pollination is difficult
100
34 - 5 -20
What do these numbers stand for if they were on a bag of fertilizer?
Nitrogen - Phosphorous - Potassium
200
List 4 reasons why plants are important to the ecosystem.
Plants provide oxygen.
Plants are able to use carbon dioxide. (Less Pollution)
Plants are start most food webs.
Plants also provide shelter for animals.
Plants clean and filter water.
Plants help prevent soil erosion.
200
Name 4 root crops?
carrots, radishes, garlic, onion etc. (not potatoes)
200
True or False. An apple tree goes through asexual reproduction to reproduce.
False
200
Explain what monoculture is.
Farmers only grow one type of crop in one particular area
200
What is nitrogen good for in plants?
Nitrogen helps leaf growth and greens the plants.
300
What is plant fibre?
fibre: is the tissue of plants from the stem, leaves, seeds or roots.
300
What does a plant need to go through photosynthesis?
Carbon dioxide, sunlight, water.
300
What is the name of the male and female reproductive part of the flower?
The male part is the stamen and the female part is the pistil.
300
Compare selective harvesting and clear cutting.
clear cut (removing all the trees)
selective harvesting (removing only selected trees)
300
Name four things soil is made of?
rocks
sand
Roots
beetles
worms
dead roots
plants
nutrients
water
air
clay
400
Name three attributes that would make a weed successful?
Hardy, broad leaves, easy dispersion of seeds, strong roots.
400
Roots perform three main functions. What are they?
they absorb water and minerals from the soil
they support and anchor the plant so it cannot be relocated easily
they store food to help the plant survive during times of scarcity
400
Why are bees important to pollination?
The pollen from one flower will stick to the bee and get transferred to the stigma of another flower and pollinate that flower.
400
Define sustainability.
Being able to grow food and fibre while keeping our natural systems healthy for the LONG TERM.
400
Why does salinization happen?
Too much water and not enough vegetation.
500
Name five pests.
Answers may vary.
500
Explain the process of osmosis.
Osmosis is the diffusion of water through a differentially permeable (semipermeable) membrane.
500
Explain how trees with cones reproduce.
The male cone produces pollen grains, the pollen grains blow to the female cone where it gets stuck in a sticky fluid near the ovule. A pollen tube grows to the ovule and the sperm fertilize the ovule to create a seed.
500
What are 2 positives and 2 negatives of monoculture.
Positives - you can use large machines to increase efficiency
- buy in bulk to cut cost
Negative - use of chemicals
- destroys ecosystems.
500
Why is organic material so important to soil? Give 2 reasons