Antimicrobial drugs are of limited usefulness because MOST STRAIN OF B. ANTHRACIS ARE RESISTANT TO A WIDE VARIETY OF ANTIMICROBIAL DRUGS. Bacillus anthracis is gram positive bacteria which exists in two forms; vegetable and spores form. It is an agent of bio-warfare because of its ability to kill quickly.
Answer:
Option D
Explanation:
Whether a G alpha subunit is active or inactive depends on which guanine nucleotide is bound to it. Binding of GDP or GTP results in the protein switching between two conformational states.
Dissociation of GDP for GTP with the G alpha subunit structurally shifts the switch II helix region, allowing for the association of G alpha with its effector proteins, such as adenylate cyclase,describes the structural changes that occur in a G alpha subunit due to guanine nucleotide binding
Answer:
The correct answer is - Option B.
Explanation:
Before the Industrial Revolution, the light color moths were predominant so that they can blend in with the light-colored trees and lichens in their environment. After releasing coal smoke from factories, the trees became darkened, and the light-colored moths become an easy target for predator birds to spot.
Over time, the frequency of the dark moth increased due to they had a higher survival rate in habitats affected by the air pollution and it blends with darker coloration blended with the sooty trees. This is a shift in the population’s genetic variance toward the new, phenotype.
In graph B, light color moth frequency decreases, and after natural selection increases over time and after a decrease in evolution the dark color again decreases.
During the Quaternary Glaciation, ice sheets expanded, notably from out of Antarctica and Greenland.
The answer is D. -Antarctica
