If you pick up a handful of soil from your garden, everything you are holding in your hand
represents a(n) __________.
a. organism
b. population
c. community
d. ecosystem
D
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The genomes of free-living spirochaetes are larger than those living in animal hosts. Why might this be so?
A. Free-living spirochetes will need genes to code for additional proteins to synthesize or obtain their own food from the environment around them. Parasitic spirochetes obtain nutrients from the animal host, and may not need to move towards those nutrients either. B. The spirochetes in animal hosts are different species entirely. As different species, they would naturally have smaller genomes. C. A smaller genome implies simplicity-the spirochetes living in animal hosts have fewer needs, so they need fewer genes. D. It isn't so-all spirochetes would have the same size genomes, since they're all the same species of microbe.
Answer the following statement(s) true (T) or false (F)
1. Plants that sequester heavy metals utilize pressure-flow where they move toxins from the source (soil) to a sink (such as the leaves). 2. A magnesium deficiency would impact the light-independent reactions but not the light-dependent reaction of photosynthesis. 3. A parasitic plant without chlorophyll is likely to lack leaves. 4. A plant with 80 available ATP could produce 10 molecules of NH3. 5. Blocking the proton pumps in a root would result in a more negative membrane potential and an increase in K+ uptake.
A factor associated with SIDS is ____
a. sleep apnea b. lung cancer c. high altitude sickness d. low red blood cell count e. TB
Which of the following molecules does NOT have a
total of three carbon atoms? a. PEP b. PGAL c. fructose-1,6-biphosphate d. pyruvate e. phosphoglycerate (PGA)