In subarctic saltmarshes, scientists have found that the addition of calcium has no effect on productivity, but additional iron does increase productivity. In this example, iron
A. is a limiting factor.
B. biomagnifies in the marsh plants.
C. is a precursor to calcium.
D. stimulates evapotranspiration.
E. blocks the effect of calcium.
Answer: A
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a. single-stranded RNA templates b. histones from other species c. artificially engineered gene sequences d. related genes from other species e. unrelated genes from other species
Which statement is NOT generally characteristic of parasites?
a. They are specialists and usually are able to affect only one variety of hosts. b. They inflict serious injury and kill their hosts. c. Some reside inside their hosts, whereas others live outside their hosts. d. Their host may be a plant as well as an animal. e. Plants as well as animals can be parasites.
Describe the path of urine from the kidney to the outside. Make sure your explanation includes all structures and muscles that are encountered as urine leaves the body
What will be an ideal response?
Transfer of DNA between bacterial cells by viruses is called (transformation/transduction/conjugation)
What will be an ideal response?