Answer:
Explanation:
Key developments in blood transfusion techniques
• Animal experiments over the years 1900-1916 gradually enabled transfusion to become the routine technique it is today. The key developments were:
• George Crile (1907) perfected the technique of transfusion from artery to vein using dogs, and described its application in 32 patients.
• Hustin (1914) showed that addition of sodium citrate could prevent blood from clotting and that citrated blood could be safely transfused into dogs.
• Richard Lewisohn (1915) determined the maximum amount of citrate that could be transfused into dogs without toxicity and thus determined the optimum concentration that could be added to blood for the best anticoagulant effect.
• Weil (1915) showed that citrated blood could be stored for 2 days and still be effective when transfused into guinea-pigs and dogs which had lost blood.
• Rous and Turner (1916) used rabbits to demonstrate that, with certain additives and proper treatment, citrated blood could be stored for 14 days and still be successfully transfused.
Through these animal experiments, the prolonged storage of blood without clotting thus became possible, so enabling the establishment of blood banks, and blood transfusion as a routine procedure.
It would be 75% because that is 3/4, the chances of dominant offspring.
Answer:
An older female squirrel that sounds an alarm call to warn her relatives of an approaching aerial predator
Explanation:
Kin selection is the evolutionary adaptive strategy that increases the survival rate of the organism by increasing the reproductive success of the genes and other close relative genes.
The organism increases the chance of survival of the close relatives and their offspring at their own cost.
The kin selection behavior is observed in many species including humans, bees, wasps, squirrels, and many others.
In the given question, the squirrel especially an old squirrel gives an alarming call when a predator comes in their range which allows enough time to run away from the predators and increase the reproductive rate of the population.
Thus, the selected option is correct.
Answer:
"The prominent bony ridge that you can palpate across the posterior surface of the scapula is the <em>scapular spine"</em>.
Explanation:
A scapula is a plane and triangular bone located in the superior and posterior part of the thorax. The <em>posterior face</em><em> of the bone is divided into the supra-spiny fossa and infra-spiny fossa</em>. These two areas are <em>divided by the </em><em>scapular spine</em>. This is a <em>bony formation</em> that <em>goes from medial to the lateral</em> side of the scapula <em>and finishes</em> in one of the extremes as a bulky prominence called <em>acromion</em>.
The spine is easily palpable through the skin.