The defining characteristic of potable water is that it a. is used as tap water b. can be used for washing and irrigation c. can be used and consumed without risk d. is delivered through pipes select the best answer from the choices provided a b c d

The following image is of a diatom. it lives in water and gets food from photosynthesis. it is encased in a hard shell made of something similar to glass or sand . a diatom is a(n) because it has a) multi-celled organism; specialized parts. b) vertebrate; a skeleton. c) insect; an exoskeleton. d) single-called organism; only one cell.

Astudent observes a star from two positions of earth in its orbit, in summer and winter, and measures the change in the position of the star. which of these can be best calculated by this method?

Which of these is a provisioning service people get from the ocean