The portion of Earth that supports the existence of living things is the O ecosystem O habitat O biosphere O niche

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?

For this question look at the hydropic diagram water that is heated by the sun evaporates. select the number that represents it.

The transport tubes for food coming down the plants are called?