The answer is c) a pollen tube grows from the pollen grain into the ovary.
Explanation:
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An autotrophic protist - they can perform photosynthesis and mainly consist of unicellular algae. they can be divided into number of systematic group according to the shape of their cell and the type of photosynthetic pigments they use.
Answer from: Quest
it cools slower in the earth meaning the crystals have more time to form than lava on the surface
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