Which substance provides humans with their main source of energy

The structure that forms between the mother and unborn baby and does the work of several organs is the?

What are the smaller parts of a genome

Which best describes soil found in grasslands? A. unable to support life B. wet and rich in organic matter C. moist with rocks and nutrients D. dry with little organic matter

Cyanobacteria are important to the evolution and advancements of other life on Earth because they A) were the first life form on earth. B) produced oxygen from photosynthesis. C) were the first group of organisms to leave a fossil record.

What are the differences between internal receptors and cell-surface receptors?

What evidence would you use to show that the daily movement of Earth's tides follows a pattern?

Which organs work together to make an organ

Do orange juice contain starch

Which of the following is not an example of predation? a. A blue whale feeding on zooplankton b. A tree obtaining nutrients from the soil c. A caterpillar eating the leaves of a treed. A wolf eating a deer

How might stem cell research change the future of organ transplantation? A. Stem cells could be designed to duplicate the patient's immune system, making immunosuppressant drugs unnecessary. B.