Science concept 1 - Plants for Food & Fibre Flashcards
(24 cards)
Do all plants have stems, leaves and roots?
Yes (In general)
Definition of Capillary Action.
The process that water is taken up a plant through tiny tubes.
Definition of Transpiration.
The process of a plant losing water through its leaves.
Definition & Example of Diffusion.
The process of particles moving from an area of high concentration to low concentration. Perfume.
Definition of Osmosis.
The process of water moving across a membrane.
The correct formula for cellular respiration is:
Glucose + Oxygen → Carbon dioxide + Water + Energy
Definition of Active Transport.
Needing energy to move a substance in and out of plant cells.
Life Cycle of a Plant.
Adult → pollination → seed → seedling
Correct order for pollination to occur.
Pollen → stigma → pollen tube → ovary
Definition & Example of Fibre.
The tough, stringy parts of plants that help support and hold the plant up. Ex. Wood, cotton, and paper
This type of soil is ideal for plants. It holds a good amount of water and contains a lot of humus.
Loam.
This type of soil does not have much humus and has very little space for roots to spread out.
Clay.
This type of soil has too much space, so roots cannot hold on. It also has a little humus.
Sand.
What would be something that degrades soil?
Land Clearing.
Definition of Yield.
The amount of crop or food produced from a plant or farm.
Definition of Crop Rotation.
Planting different crops in the same area in different seasons or years to keep the soil healthy.
Definition & Example of Irrigation.
Supplying water to crops by artificial means. Ex. Sprinklers or canals.
Definition of Selective Breeding.
Selective breeding is the process where farmers choose plants with desired traits, such as a short growing season, and breed them to produce offspring that will grow those traits as well.
Definition & Example of Unintended Consequence.
A result that happens that wasn’t planned or expected. Ex. Farmers use pesticides to kill pests, but might kill good insects like bees or ladybugs which can harm the ecosystem
Why is it important to manage our living resources?
So our living resources so they do not become overused or damaged, which will allow our future to be beneficial, keeping ecosystems healthy.
Why would someone want to go through selective breeding for plants?
So that plants will develop to taste better, higher yield, disease resistance, shorter growing seasons which will improve quality and productivity.
Why are plants important? Give 5 examples of what they do for humans.
1) Provide oxygen 2) Produce Food 3) Provide Materials 4) Clean the Air 5) Support Ecosystems
How can environments be modified to increase crop yield? (4 examples)
Irrigation, fertilizing, pest control, selective breeding.
Give an example of biological controls that can be used instead of pesticides.
Using ladybugs to eat aphids, which are pests that damage plants. This method controls pests naturally without chemicals.
