an animal that eats plant material only.
drugs that are used to treat infections caused by bacteria. Many antibiotics are produced by...
a large tongue-shaped organ in the mammalian body which secretes hormones and digestive enzymes...
birds without a keel on their breastbones and therefore unable to fly, for example ostriches....
(also called selectively permeable membrane) a membrane which allows some substances to cross it...
pressure due to turgid (inflated) cells.
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