Science Unit 5 Quiz 1

Topic 1

Parts of a plant
- Stem
- Support
- Food storage
- Transportation (Water + nutrients)
  - Xylem - transports water from roots
  - Phloem - transports nutrients from roots + transports sugar from leaves
- Roots
- Absorb water + nutrients
- Anchors
- Food storage
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Photosynthesis - To make food by using light
- CO2 + H2O + energy —> C6H12O6 + O2
- Green pigment needed for photosynthesis - chlorophyll
Respiration - breaking down sugars to release energy
- C6H12O6+O2 —> CO2 + H20 + ENERGY
Transpiration
- Loss of water vapor through a living organism
- Stomata - Opening in leaf
- Guard cell opens/closes stomata
- Releases H2O
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Topic 2

Plant reproduction
- Sexual
- Genetic material of 2 parents
- Asexual
- Single parent - offspring will be identical (clones)
- Flowers
- Contain plants reproductive organs
- Can be male female or both
- Stamen - Male reproductive organ
  - Anther - pollen(sperm)
  - Filament - stalk supporting anther
- Pistil - female reproductive organ
  - Stigma - receives pollen
  - Style - tube connecting stigma and ovary
  - Ovary- contains the egg
- Cross pollinate or self pollinate
Cross fertilization
- Pollinators: Insects, birds, animal fur, wind
Asexual reproduction
Does not require a mate
Easier, faster, less energy
Less variety in traits of offspring (less genetic diversity)
Deteriorate likelihood of survival
Sexual reproduction
Greater variety (more genetic diversity = likelihood of survival goes up)
Slower, more energy