The right answer is supplying oxygenated blood to the arteries that travel to all major body parts
Aorta is the principal artery of the body.
It starts from the left ventricle of the heart, passes through the thorax and abdomen to separate at the lower part of the abdomen, into two branches called common iliac arteries for the lower limbs. We talk about thoracic aorta then abdominal aorta along its path in relation to the anatomical position. All arteries in the body (carrying oxygenated blood) are directly or indirectly derived from the aorta except the pulmonary artery.
Answer:
If the grasshopper is removed, the snakes will die, because the snakes have nothing to eat, and whatever eats snakes will die, and so on.
<span>a. chromosomes hope that helped I'm doing the same quiz.</span>
Answer:
The answer is B and D.
Explanation:
PKA ( Protein Kinase A) is an enzyme which becomes active with the presence of cAMP molecules in the cell and the cAMP molecules need to bind to R subunits to become active which happens at a ratio of 1:2.
The example given in the question states that the Ro sububit can bind to 8 molecules of cAMP rather than the conventional 2.
This means that the activation of the Ro subunits is harder than the activation of R subunit because of the requirement of higher cAMP concentrations.
B is correct, full activity of PKA with Ro subunits needs a higher concentration of cAMP.
Because Ro binds to eight units of cAMP, the dynamic range of activity of PKA with Ro is going to be over a wider range of cAMP concentration.
I hope this answer helps.
