All of the populations of different species that occupy and are adapted to a given area are known as ____.
A. the biosphere
B. a community
C. an ecosystem
D. a niche
E. the habitat
Answer: B
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A metabolic reaction will most likely reverse itself when the ____
a. pH is too high b. temperature is too low c. reactant concentration is too high d. product concentration is too high e. enzyme concentration is too high
Several biology students have just returned from a field trip in which they were asked to collect prokaryotes and eukaryotes
The eukaryotic organisms were to be divided into plant cells, animal cells, or "other." The students have access to a light and electron microscope. Can you suggest how they could determine whether these cells are prokaryotic or eukaryotic? How could they distinguish plant from animal cells? What will be an ideal response?
Why is the total biomass of secondary consumers normally less than that of primary consumers?
What will be an ideal response?
Why is the unknown in this example not Pseudomonas?
a. It is a rod-shaped cell. b. It can tolerate oxygen. c. It ferments lactose. d. It is a Gram-negative cell.