Senescence may be counteracted by
a. removal of old flowers.
b. removal of seed pods.
c. inhibiting nutrient diversion to fruits.
d. all of these.
e. none of these.
Answer: d
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Monoclonal antibodies are those that:
a. react with many different types of anti-gens. b. react with many species of bacteria within the same genus. c. are produced by the offspring of a single hybrid cell. d. can be produced from many different spe-cies of host organisms.
Deep-sea vent or rift communities would be associated with which bathygraphic feature?
a. Escarpment b. Rises and ridges c. Trenches d. Submarine canyons
This occurs when there is a problem with controlling how cells divide and replace themselves.
A. crossing over B. nondisjunction C. cancer D. death
Which of the following is a natural process of plants that can be used by humans to remove toxins from soils? Check all that apply.
A. physiological breakdown of the chemical into harmless products B. transport of toxins absorbed by the roots into the shoots, where they can be collected more easily C. root pressure pushing toxins from deep in the soil towards the surface D. secretion of a substance from the roots that breaks down the toxic chemical E. "storage" of a toxic chemical in plant tissues, which are then removed from the site