4.2 - plant reproduction & growth

Question 1

gymnosperm sexual reproduction

Answer 1

• gymnosperms use male and female cones to produce
• male cone are smaller and are located on the bottom of the tree
• female cones are larger and they grow at the top of the tree
• this encourages the pollen from other trees to come and fertalize the female cones rather then the laoe. ones fertalizing themselves

Question 2

importance of plants to canadian society

Answer 2

• for many years humans have been extracting biochemicals from plants to produce
• perfume
• dyes
• medicine

Question 3

Plants as a food source

Answer 3

• 1 in 7 jobs in canada are involved in agricultre
• maple syrup and maple sugar make up 10% of canadas economy
• 600 million

Question 4

Plants as a food source

the 3 sisters and how they work together

Answer 4

• 3 sisters called corn, beans,sqush
• the corn grows vertically for the beans to climb (thigmotropism)
• bean plant decays and provides nitrogen for squash and corn
• squash grows horizontally and protects the corn and beans from pests and dehydration

Question 5

Plants and their medicinal uses

Yams species

Answer 5

Biochemical: Diogesgenin
Use: Birth control

Question 6

Plants and their medicinal uses

cinchona tree

Answer 6

Biochemical: quinine
use: treats malaria and kills plasmodium

Question 7

Plants and their medicinal uses

Indian snakeroot

Answer 7

Bicochemical: Reserpine
Use: Treats high blood pressure

Question 8

Plants and their medicinal uses

cassia

Answer 8

Biochemical: Senniods
Use: Laxitive to relieve constipation