Which layer of Earth has the highest density and temperature?

Fossil fuels include

Hypothesis on food web

Which type of carbon fixation stores carbon dioxide in acid form

An 11-year-old girl is in the clinic for a sports physical examination. the nurse notices that she has begun to develop breasts, and during the conversation the girl reveals that she is worried about her development.

Plants are green because they contain the protein chlorophyll. A bucket was left on the lawn for one week. When the bucket was removed, the grass under the bucket had turned from green to a yellowish white color.

The concept of endosymbiosis (chloroplast & mitochondria) is widely accepted. What kind of relationship is it?

Which planets have moons? A) Earth only B) Jovian only C) Terrestrial only D) Both Terrestrial and Jovian

Given that transcription - the production of mRNA - requires a DNA template, where do you think this process occurs in the cell?

Introduced species can threaten biodiversity because they a. cause desertification b. cause biological magnification c. crowd out native species d. reduce the amount of fertile land

Sirius B was an important star in ancient Egypt and was used to warn for floods on the Nile River. Is Sirius B brighter or dimmer than the Sun? * a) Brighter* b) Dimmer