The key difference between microspore and pollen grain is that microspore is the small spore that develops into the male gametophyte in plants while pollen grain is the small grain that contains the male gametophyte.
This kind of modeling is known as (D) simulation. A computer program is used to simulate an environment, in this case, the zoo. Instead of having to do an actual experiment which harms real animals, a simulation is done to cut costs and avoid using live samples.
Answer: False.
Explanation: The Archimedes screw was initially used for removing water from the hold of a large ship, not for moving people.
Answer:
D. Sexual orientation
Explanation:
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