Gymnosperms were the first seed plants. They do not make flowers or fruits, so their seeds are unprotected, hence the name gymnosperms which means "naked seed".
These seeds are wind-dispersed pollen that doesn't need water for fertilization.
The blood in the capillaries is passed into the tissues through diffusion i.e glucose down their concentration gradient from source(higher conc) to sink(low conc)
The answer is d.
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The answer is primary. That means the answer is a.
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