The splitting of carbon dioxide to form oxygen gas and carbon compounds occurs during

A) photosynthesis.

B) respiration.

C) both photosynthesis and respiration.

D) neither photosynthesis nor respiration.

E) photorespiration.

Que tienen en común los experimentos de Urey y Miller con las condiciones de la tierra

Which form of coal burns the hottest?

Speciation is the process by which new species are formed. Which of the following circumstances is most likely to lead to speciation?

The temperature in a desert can fluctuate from being over 100° F during the day to below 40° F at night. Why can the desert experience such a daily temperature change?

Which best describes the testes?

This is the term that refers to the illegal and unjust treatment of a person or persons because of their race

What happens to molecules in a liquid when it becomes a solid?

Is a nucleic acid that contains the genetic information for heredity in most organisms. A. a chromosome B. genetics C. a gene D. heredity E. DNA

Sandy experimented with the placement of the straw and the balloon while making this air powered toy car. He taped the straw and balloon to face toward the right. He told Tim that his toy will travel to the right. Tim said that Sandy was wrong.

You are a biomedical researcher who is interested in designing a drug to increase bone density. You have decided you can take one of two approaches: (1) design a drug that stimulates bone to be built faster, or (2) design a drug that prevents bone