Hope the helped, you can read this and make a educated guess based off information given.
All cells have cell membranes<span>, and the </span>membranes<span> are flexible. So </span>animal cells<span> can</span>have<span> various shapes, but </span>plant cells<span> only </span>have<span> the shapes of their </span>cell walls<span>. That's nice for </span>plants<span>, because it gives them the ability to grow up and out, where they can get lots of sunlight for making their food.</span>
Vascular tissue
Of course plants don't have hearts, but they do have vessels which transport water, minerals, and nutrients through the plant. These vessels are the vascular tissue.
Population Size, Good Luck!
Answer:
Using single-lensed microscopes of his own design and make, Van Leeuwenhoek was the first to observe and to experiment with microbes, which he originally referred to as dierkens, diertgens or diertjes (Dutch for "small animals" [translated into English as animalcules, from Latin animalculum = "tiny animal"]).
Leeuwenhoek named the cells he observed originally as dierkens, which is the Dutch word for small animals, and translated to English as animalcules.
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Though I may be wrong :( ...
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The answer is c ) reservoirs