Answer:
b. successfully interbreed
Explanation:
At first, these two kinds of warblers are described as two different species because of their ranges. However, if they are described now as a single species, that means that they can mate between them. A species, in general terms, is defined as a reproductive unit of organisms, so if a group of organism can produce fertile progeny, it is called "species".
Living in the same area, or having an identical appearance are not criteria to call a group of individuals "species". So, options a and c are wrong.
Option "d. are merging to form a single species" implies than before, the two types of warbles were different species, and now they formed a new single species. This is not what the rubric says. In this example, the two warbles always have been a single species, but before they were wrongly categorized, probably because it wasn't known that they were able to interbreed.
Norepinephrine and epinephrine are secreted into the
bloodstream when sympathetic stimulation is provided to the Adrenal Medulla. The
sympathetic nervous system (SNS) originates in the spinal cord and it’s
responsible for the activation of physiological changes that occur during the fight-or-flight
response.
Answer:
we have two kidneys is so that there is some extra reserve of kidney mass in case we sustain some renal insult .The kidney is made up of nephrons, whose job is to filter, secrete and reabsorb solutes and water. More kidney mass = more nephrons.
Explanation:
The correct answer is hydronephrosis. Distention means being enlarged or swollen due to internal pressure. In this case, the internal pressure would be urine collecting in the kidney. This occurs when the urine is unable to drain from the kidney to the bladder due to an obstruction. Contrary to common belief, hydronephrosis is not a disease itself, but is instead is the result of a disease.
