I assume that this is your question with the options:
Proteins scan chromosomes for damage during:
A) the G1 checkpoint
B) Beginning of the synthesis phase
C) Apoptosis phase
D) G2 checkpoint
E) Metaphase checkpoint.
Answer:
The answer is option A): G1 checkpoint.
Explanation:
During the internal checkpoints for regulation of a cell cycle, proteins usually scan chromosomes for damage to DNA and evaluate other external factors at the G1 checkpoint in order to ascertain whether conditions are inadequate. If conditions are inadequate and damages exist, cells will not be allowed to continue to the next phase.
Fossil Record - Provides proof by exposing the details of a ancestor for compared to the living one.
Geographical Distribution of Living Things - a pattern of the ancient existing species, isolated land and islands have their own species of plants and even some animals.
Similarities in Development - Charles Darwin used the science of embryology to test many species within a class to find out that they are similar even if the adult version looks completely different.
Molecular Similarities - its believed that natural selections isn’t the reason for evolution actually its the genetic drift of mutant alleles that are neutral.
I hope this is good
Answer:
On the basis of Chargaff's rule, in a double-helical DNA, A = T and G = C (Here A means adenine, T means thymine, G means guanine, and C means cytosine. For X, A is given 32%, therefore, T must be 32%, and the leftover 36% is to be distributed equally between G and C. Thus, G = C = 18% each.
The assumption formed is that the DNA is a double-stranded structure. The species that exhibits higher G + C content in the molecule of a DNA is steadier at higher temperatures as it melts at high temperature. The species Y, which exhibits G + C in total as 66% is the thermophilic bacterium between the two.
Answer:
The correct answer will be option- Australopithecus.
Explanation:
<em>Australopithecus</em> is an extinct genus of a large group of animals called primates. This genus is closely related to humans which may or may not be ancestors of <em>Homo sapiens</em>.
Australopithecus exhibits traits of both ape and human-like which is distinguished by the small size of the brain, smaller canine teeth but large molar and premolar teeth, broad dish-shaped face, sagittal crest, large molar teeth, flared zygomatic arches and sloping forehead.
Thus, option- Australopithecus is the correct answer.
