Answer:
Coronary angiography
Explanation:
Chronic stable angina occurs when the heart needs more oxygen during strenuous activities and the chest pain can reduce during rest unlike for unstable angina that is due to narrowing of blood vessels that can be examined through Coronary angiography. So the blood vessels in stable angina are not narrowed like in unstable angina
Answer:
Some brain cells start dying less than 5 minutes after their oxygen supply disappears. As a result, brain hypoxia can rapidly cause severe brain damage or death.
Explanation:
<span>Glycosis helps to process glucose to pyruvate in many cellular respiration procedure.
<span>In
the presence of oxygen, one glucose molecule has the energy to make up
to 38 ATP. The ATP production is determined by the following steps, (-2
ATP) glycolysis preparatory phase, (7-9 ATP) glycolysis pay-off phase,
(5 ATP) oxidative decarboxylation of pyruvate and (20 ATP) Krebs cycle.
One glucose which has 38 ATP hence was the summation of all the process
mentioned that took place. All these process take place under the
cellular function of cellular respiration.<span> </span></span></span>
Question no 1:
As mentioned in the question that parents are heterozygous for freckles (Ff).
Please see the punnet square in attached picture.
Question no 2:
As we can see in figure offspring will be as:
P1: Ff X Ff
F1: FF: Ff : Ff : ff
Phenotypic ratio: 3: 1
Genotypic ratio: 1: 2: 1
This is because freckles is a dominant trait and even one allele of dominant treat is enough to cause freckles to the offspring. However genotypically there is a difference between FF and Ff because the Ff will have lower chances to inherit the trait to offspring and FF will have more chances to transfer the trait to next offspring.
Hope it helps!
Mutations are more susceptible to natural selection in large populations, such as the bacterial ones. The bigger the population it is and the shorter the lifespan of the organism, the tougher is the competition between the individuals. So, even a small change, a mutation that enables its holder to have even slightly more chance to survive and reproduce makes a huge difference.
In addition, bacteria have prokaryotic cells that lack the DNA repair mechanisms and they are replicating more often than human cells with eucaryotic cells, which explains the higher rate of mutations in their genomes compared to human ones.