The Hubble Constant is used as an indication of the universe expansion. When astronomers find the distances between stars, they use methods of parallax or the stars brightness.
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I'm not completely sure but I think the answer is the last one. The living things need water because it is a major component of a cell membranes answer.
Support the cell. Aid in cell movement.
Answer:
Explanation:
Species can have multiple adaptations such as either structural or reproductive adaptation.
Example of structure adaptation for animals would be for giraffe. Their long neck allow them to reach for food high up in the trees. They have adapted to their environment.
Example of reproductive adaptation would be for flowers. The reasons plants have bright colored flowers is so that they can attract insects, birds or even bats which can inadvertently transfer pollen from one plant to another.
