Pigs are free to known diseases i think. i’m sorry if i’m wrong i just know that domestic pigs are known to be the best donors because of their biological materials for xenotransplantation.
Option B, small angle, is the right answer.
The polar areas are also known as the freezing zones are the areas of Earth, are the regions of the planet that encompass its terrestrial poles (the South and North Poles), extending in the polar rings. The term solar radiation is referred to as the electromagnetic radiation released by the sun. In the Polar Zone, the radiations from the Sun hit the surface at a small angle. As a result of this, the distribution of light increases in the atmosphere of the earth.
A branch point on a phylogenetic tree is a separation point, from where a lineage is evolved into a new different lineage. The basal taxon is the unbranched lineages which evolved from the root.
Answer:
Involuntary respiration is controlled by the respiratory centers of the upper brainstem (sometimes termed the lower brain, along with the cerebellum). This region of the brain controls many involuntary and metabolic functions besides the respiratory system, including certain aspects of cardiovascular function and involuntary muscle movements (in the cerebellum).
Explanation:
The respiratory centers contain chemoreceptors that detect pH levels in the blood and send signals to the respiratory centers of the brain to adjust the ventilation rate to change acidity by increasing or decreasing the removal of carbon dioxide (since carbon dioxide is linked to higher levels of hydrogen ions in blood).
