Answer:
1 is b
2 is c
3 is either b or c
i don't really remember 4, sorry
Explanation:
Answer:
Photosynthesis occurs when the plant is take in sunlight to make food from carbon dioxide. Plants produce oxygen when they go through photosynthesis. Photosynthesis occurs in the chloroplasts.
Bryophytes do not have vascular tissues. Sporopollenin is the inert biological polymers. The outer wall of the plants and pollen grains. The sporopollenin serves as the Bryophytes protection.
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Air pollution. Cleaner burning than other fossil fuels, the combustion of natural gas<span> produces negligible amounts of sulfur, mercury, and particulates. Burning</span>natural gas does<span> produce nitrogen oxides (NOx), which are precursors to smog, but at lower levels than gasoline and diesel used for motor vehicles.</span>
It sends an electrical impulse to make your heart beat. The job of a pacemaker is to artificially take over the role of your sinus node if it isn't working properly. Electrical impulses are sent by the pacemaker to stimulate your heart to contract and produce a heartbeat