The answer is a the first one.
Tropical climate is a region of the earth surrounding the equator. When the earth is exposed to light from the sun it is right over the equator and up 23 degrees of latitude Tropic of Cancer in the northern hemisphere and Tropic of Capricorn in the southern hemisphere
E; translocation, which is a chromosomal rearrangement in which a part of genetic material from one chromosome becomes heritably (genetically) tied to another chromosome.*
Sources:
*Definition of "Translocation" (Paraphrase):
http://www.dictionary.com/browse/translocation?s=t
The Philadelphia Chromosome:
https://www.medicinenet.com/script/main/art.asp?articlekey=4870
<span>The pulmonary vein is </span><span>the structure of the human heart which is a large vein that carries oxygenated blood from the lungs to the left atrium of the heart.</span>