People and Plants
Nearly _____% of the world’s food supply is based on seven major crops
75
These help keep the soil in place so it doesn’t erode as easily or blow away.
roots
sticky tip that captures pollen grains
stigma
Being able to grow food and fibre while keeping our natural systems healthy for the long term is referred to as __________.
sustainability
These steal moisture, nutrients, space and light from plants.
weeds
Plants provide __________ for organisms to survive.
Oxygen
This root system has a strong central root and reaches deep into the ground to obtain moisture.
taproot system
This process of the pollen travelling to the female cone is called _______.
Pollination
watering fields and crops by using ditches, pipes and sprinklers is _________.
irrigation
__________ species can become very serious because there are not any natural controls for them.
introduced/exotic
Plants are able to reduce the problem of pollution, by using __________ ____________.
carbon dioxide
the spread out of particles from an area of high concentration (the ground) to low concentration (the root) is known as: ________
diffusion
Process of selecting and breeding individuals with desirable traits to produce offspring that have the same traits.
artificial selection/selective breeding
Healthy soil should contain these 3 things: _______, ________, and ____________.
worms, fungi, bacteria
using a pest’s natural enemy to control it
biological control
Currently the world’s most important non-edible plant.
Cotton
This is a process by which plants release carbon dioxide and let oxygen into their cells, it happens at night.
respiration
This type of reproduction occurs when a ‘parent’ plant grows new plants from the roots, stems, or leaves. It does not involve a seed. The new baby plant looks exactly like the parent plant.
asexual/vegetative
Build up of salt on the soil near a body of water is _________.
salinization
_______ food is food that has been grown without the use of chemical fertilizers and chemical pesticides.
organic
Liquid fuel from wood, also called wood alcohol
methanol
Sugar (the plant’s energy) is carried from the leaves to the rest of the plant by a structure called a
phloem
DAILY DOUBLE!
Thousands of years ago, wild apples were small and often bitter. Humans bred specific trees to produce larger, sweeter, and better-tasting apples. This is an example of _________ ___________.
selective breeeding
When a farmer only has one type of plant in a field, this is known as a _________ _____.
monoculture crop
What is bioaccumulation?
increase in pesticides as you go up the food chain