What does the cell theory state A that all living thing are made of cells B every cell has only one nucleus C that plants cannot have cells D b animals are the only organisms that have cells

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?

What are two reasons for why a species might disappear from the fossil record?

Use the drop-down menu to match the following definitions to the corresponding terms. the total variety of organisms that live in the biosphere a group of organisms that breed and produce offspring that can breed all of the biotic and abiotic factors in an area