Describe the carbon cycle from the atmosphere to the primary producers and back again.

What will be an ideal response?


Biology & Microbiology

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Approximately how long after fertilization does the egg implant in the uterine wall?

A. 5 days B. 1 day C. 3 days D. 7 days E. 10 days

Biology & Microbiology

Suppose a plant had a photosynthetic pigment that absorbed far-red wavelengths of light. In which of the following environments could that plant thrive?

A) on the surface of a lake B) on the forest floor, beneath a canopy of taller plants C) on the ocean floor, in very deep waters D) on mountaintops, closer to the Sun

Biology & Microbiology

Which of the following statements about red blood cells is true?

A) The main function of red blood cells is to carry nutrients. B) Red blood cells are shaped like biconcave disks. C) Each red blood cell contains about 1 million molecules of hemoglobin. D) Red blood cells in adult humans have nuclei.

Biology & Microbiology

Which statement about plant hormones is true?

A) Plant hormones are produced in very small concentrations. B) Plant hormones mainly affect reproductive processes. C) A hormone typically has a single, specific effect on all cells. D) Plant hormones play a vital role in photosynthesis.

Biology & Microbiology