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the field of study that provides scientific names for organisms, describes them, preserves collections of them, provides classifications for them, keys for their identification, and data on their distributions, investigates their evolutionary histories, and considers their environmental adaptations.
single-celled floating algae, which provide food for marine animals, such as fish and whales....
a hormone produced by the pituitary gland, which helps to limit the amount of water lost from...
a muscle, gland or organ capable of responding to a nerve impulse in order to bring about a...
a very long time span in the Earth's history, covering tens or hundreds of millions of years....
proteins that identify and neutralise foreign and potentially harmful antigens by binding onto...