Biology, 17.12.2020 17:30, klocke2001
Since 2008, GMO crops have accounted for more than 80% of the corn and soybean crops planted in the U. S. Corn (maize) seeds
are modified with two genes: one kills insects that eat the seed and one allows the seed to tolerate glyphosate, a herbicide
commonly used in weed killers like Roundup. Soybeans are modified with just one glyphosate-resistant gene. Since 2008,
scientists at the University of Virginia have been monitoring the effects of planting GMO corn and soybeans within farm
ecosystems. The UVA study found evidence that both corn and soybean farmers have increased herbicide use during the last five
years and the scientists concluded that the planting these GMO crops are having a negative impact on the local environment. Why?
ALL BUT ONE choice provides a valid reason.
ght
A)
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ning
0:58
Bols
Increased herbicide use results in increased contamination of aquatic
ecosystems
B)
Farmers resort to using additional chemicals as glyphosate-resistant
weeds evolve.
The cultivation of GMO's led to a significant increase of yield compared to
the non-GMO varieties
D)
Herbicides can have unintended consequences for nontarget plant species,
thereby reducing plant biodiversity
Answers: 2
Biology, 21.06.2019 17:10, alejandra1201
Salmonella typhimurium is a food-borne bacterial pathogen that can cause severe gastrointestinal disease. salmonella is often phagocytosed by macrophages that normally destroy bacterial pathogens, but this bacterium is somehow able to prevent the complete maturation of phagolysosomes. salmonella is able to tolerate the low ph of phagolysosomes, and in fact responds to the drop in ph by secreting toxins that interfere with other cellular responses. which of the following differences would you expect to contribute to the survival of a bacterium within an salmonella-containing phagosome, compared to a healthy phagolysosome? decreased activity of acid hydrolases increased activity of acid hydrolases decreased import of h+ ions increased import of h+ ions my guess is decreased activity of acid hydrolases but i'm not sure.
Answers: 1
Biology, 21.06.2019 22:10, jakhunter354
Amouse that is homozygous for the dominant trait has the genotype . it has . a mouse that is homozygous for the recessive trait has the genotype . it has . image of fur color of mice
Answers: 1
Since 2008, GMO crops have accounted for more than 80% of the corn and soybean crops planted in the...
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