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Natural Science Unit 4
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Name two of the four reasons photosynthesis is important.
Food, oxygen, global warming, and habitats for animals
Why can't plants perform photosynthesis at night?
They don't have solar energy.
Which 2 processes happen in plants during the day? Which one happens at night?
Day- photosynthesis and respiration; Night- respiration
What happens with plant respiration at night?
Take in oxygen and release carbon dioxide.
What happens in plant respiration during the day?
Take in carbon dioxide and some oxygen (also release the oxygen they don't need.
What are the two products of photosynthesis?
Oxygen and glucose
Name what 4 things are needed in photosynthesis.
Water, minerals, carbon dioxide, and solar energy
What are the names of the tubes that transport glucose around the plant at the end of photosynthesis?
Phloem
What is the name of the green substance in leaves and what does it absorb?
Chlorophyll; solar energy
What are the names of the tiny pores in leaves and what gas do they absorb?
Stomata; carbon dioxide
Where in the plant does photosynthesis take place?
Leaves
What gas is being released from the plant in number 4?
Oxygen
What two things do roots absorb from the soil in photosynthesis?
Water and minerals
The xylem is similar to the _____ in the human body.
Veins
Name the process by which plants make their own food.
Photosynthesis
What are the three types of flowering plants?
Stolons, rhizomes, and tubers
How do non-flowering plants produce instead of seeds?
Spores
Explain asexual reproduction.
Fertilization does not take place.
The last step of pollination is when the fertilized ovule develops into a _______.
Seed
Name the 4 parts of the pistil and what is the function of each one.
Stigma- what the pollen sticks to; Style- tube the pollen travels down; Ovary- contains female sex cells; Ovules- female sex cells
Name 3 parts of the flower shown (and the number they are)!
1- stigma; 2- style; 3- ovary; 4- ovules; 5- pistil; 6- anther; 7- filament; 8- stamen; 9- petals; 10- base; 11- sepal
Name the male and female parts of the plant (and the sex cells of each).
Male: Stamen (pollen); Female: Pistil (ovules)
Explain sexual reproduction in plants.
When male and female sex cells join together (pollination/fertilization).
What are the three ways pollination happens?
Bees, wind, and small birds


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