Which solutes move into plant root cells is determined by ________
a. active transport
b. passive transport
c. diffusion of the solutes in the same proportion as they are present in the soil
d. chance
a
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One of the science-related concerns associated with the use of genetically modified (GM) foods is that
A) overreliance on GM crops may lead to genetic uniformity. B) GM foods are not natural. C) genetic modification degrades the nutritional value of food crops. D) buffer zones of GM crops halt the pollination of non-GM crops.
What is the purpose of dialysis treatments?
A. To constrict blood vessels to prevent death from dehydration B. To keep the airways open so one can breathe C. To replenish oxygen in the bloodstream D. To detoxify dangerous chemicals in the bloodstream
The quick response of the immune system to a second infection is due to the _____, a feature of the immune system as
demonstrated by the success of vaccines. a. activation of macrophage cells b. suppression of suppressor cells c. T and B memory cells d. high levels of antigen e. new cytotoxic T cell.
The ABO blood type system in humans is an example of:
a) codominance but not multiple alleles. b) neither codominance nor multiple alleles. c) multiple alleles but not codominance. d) incomplete dominance. e) multiple alleles and codominance.