The first one is natural, second is oil, this one is oil, fourth one is natural and the last one is coal.
Answer:
c. The skull is hard which protects the brain from being injured
Explanation:
The correct option is C
<span>C.Stomata would not open and close.
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This is because guard cells play an important function of controlling stomata. the ensures that stomata are open during the day and closed during the night for the purposes of photosynthesis. The stomata are the pores that are found on the under surface of a plant leave,whose role is gaseous exchange.
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I beleive that the plasma membrane is B. Semi permeable
