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UNIT B: Plants for Food and Fibre

Definitions

AB
flowers-parts of a seed plant used for reproduction (contains male and female parts)
stems-parts of a plant used as a pathway for water and food, also used to support leaves and flowers
leaves-produce food for plants through photosynthesis (take in carbon dioxide and release oxygen), also allow water to exit the plant via transpiration
cones-reproductive structures of some seed plants (male and female are separate)
seeds-contain an embryo that will form a new plant, also contain a food source for the embyo
transpiration-the main process that draws water up from a plant's roots
capillary action-another process that allows water to be drawn up a plant through tiny tubes in the roots and stems
osmosis-the movement of water from soil into the root cells (water moves from an area of high concentration to an area of low concentration)
photosynthesis-process by which plants produce their own food (glucose), REACTION: sunlight (energy)+ carbon dioxide + water ---> oxygen + glucose (a sugar)
chloroplasts-structures (cellular organelles) in plants that contain chlorophyll (a green pigment) which traps sunlight (energy)
cellular respiration-process which occurs in all living things whereby sugars (glucose) are broken down to produce energy REACTION: oxygen + glucose (a sugar) ---> carbon dioxide + water + energy
pores-tiny openings in the cells of plants which allow certain particles to enter and leave the cell
diffusion-the movement of particles from an area of high concentration to an area with a low concentation
active transport-the process in which large particles cross a cell membrane; this process requires energy
gas exchange-the process of gases (carbon dioxide and oxygen) entering and leaving a plant
polllination-the process in which male and female parts of a plant join to produce a seed
life cycle-the stages that a living thing passes through to go from one generation to the next
pollenthe male parts of a seed plant that unites with the female part to produce;pollen is produced by either flowers or male cones
ovarya protective structure on a seed plant that contains the ovule; ovaries are often in the centre of a flower or on a flower cone
ovulethe female part of a seed plant that joins with the male part to produce a seed; ovules are usually found inside an ovary
active transportthe process in which large particles cross the cell membrane; active transport requires energy
erosionthe process that moves soil from one place to another
living resourcesthose living things that can be used to meet human needs
mineral particalsparticals from soil that come from rock that has been broken down
humuspartly decomposed material from plants and animals that were once living
organic particalsparticals in soil that come plants and animals that have died:humas is composed of organic particals
crop rotationthe practice of planting a different crop in a particalular field each year
seed plantsthose plants that make seeds
gas exchangethe process by which carbon dioxide and oxygen move in and out of the plant
graftinga technology to reproduce plants that involoves attaching a part of one plant to a second plant
cuttingsa cut peice of a plant that is used to reproduce that plant; cuttings usually have a part of the stem and a few leaves
hydroponicsa technology for growing plants in which the plant roots are placed in a nutrient solution instead of soil
traitsa characteristic of an organism
pesticideschemicals that are poisonous to insects
monoculturethe practice of growing only one type of crop in a large area
genetic engineeringprocess in which single genes are added to a plant's genetic material
unintended consequenceresults of an actionthat were not predicted or planned
environmental managementthe process of balencing the needs of humans with the needs of the envirorment
yeildthe amount of useful plant material produced per plant, or per area planted in a particular plant
selective breedinga technology for producing new varieties of an organism that involves choosing parents with desired triats in order to produce offspring with these traits
biodiversitythe number of different species in an envirorment


Gr. 8 Math and Science
Foundations For The Future Charter Academy
AB

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