Which trophic level in a food chain would it be most damaging to remove? What will be an ideal response?
While all trophic levels are important, the primary producer (the first trophic level) would be the most
damaging to remove. Not only is it the largest by biomass, but it is responsible for converting light
energy to the chemical energy on which all the other trophic levels depend.
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Sequencing all the DNA in the fluid that leaks from the bottom of a garbage can is an example of
A) stem cell science. B) gene expression profiling. C) metagenomics. D) DNA profiling.
Some of the work with Hawaiian fruit flies illustrated the presence of a
a. prezygotic isolating mechanism, which involved behavioral isolation. b. prezygotic isolating mechanism, which involved gametic isolation. c. prezygotic isolating mechanism, which involved temporal isolation. d. postzygotic isolating mechanism, which involved behavioral isolation. e. postzygotic isolating mechanism, which involved gametic isolation.
Which system picks up excess extracellular fluid and reclaimable solutes and returns them to the
cardiovascular system? a. urinary b. digestive c. reproductive d. venous e. lymphatic
The cell membrane controls movement of materials into and out of the cell. The following particles are moving from high concentration to low concentration and are using a carrier protein. How would you describe this type of movement across the membrane?
A. simple osmosis B. active transport C. simple diffusion D. facilitated diffusion