Plant Uses
Name 2 ways humans use plants.
Food, fibre, medicine, fuel, construction, transportation
What do roots do for a plant?
absorb water/minerals, anchor, store food
What gas do plants take in for photosynthesis?
Carbon Dioxide
Name the two main types of plant reproduction.
Sexual and asexual (vegetative)
What is the male part of a flower called?
Stamen
What is the world's most important non-edible plant (used for clothing)?
Cotton
Which plant tissue moves water up the stem?
Xylem
Fill in the blanks: Sunlight + CO₂ + H₂O → ______ + ______
Sugar & Oxygen
Which flower part produces pollen?
Anther
What do plants release during photosynthesis that humans need to survive?
Oxygen
What plant product was used in Aspirin?
White willow bark
What process is it when water moves through a selectively permeable membrane?
Osmosis
What is the role of stomata in photosynthesis?
allow CO₂ in and O₂/water vapour out
What is pollination?
The transfer of pollen from the stamen to the pistil
Give one example of a pollinator other than bees.
butterflies, bats, birds, wind, etc.
Name two reasons why plants are important to the environment.
Air, food, soil, water, shelter
Explain how transpiration helps water move up tall trees.
water evaporates from leaves, pulling water upward through xylem like a straw
How are diffusion and osmosis different?
diffusion = general movement from high to low concentration; osmosis = movement of water across a membrane
Name one method of asexual reproduction used by farmers.
Grafting, cuttings, layering
Explain one advantage and one disadvantage of asexual reproduction in plants.
Advantage → offspring identical to parent, predictable traits. Disadvantage → no genetic diversity, less adaptability to change
In what ways do plants help regulate water in the environment?
Absorb/store water, filter water, regulate flow to prevent flooding/erosion
Why would desert plants often have thick stems or reduced leaves?
thick stems store water; reduced leaves/spines reduce water loss
Why do plants still need oxygen even though they produce it?
they respire at night to release energy for growth and survival
Why is genetic modification of crops sometimes controversial?
health concerns, environmental impacts, corporate control of seeds, ethics
Why might farmers prefer selective breeding or cloning plants over sexual reproduction?
consistency in traits, higher yield, predictable characteristics, disease resistance