At which position is the southern hemisphere experiencing spring?
the image includes the position and tilt of earth in its orbit around the sun. earth is tilted away from the sun in position a. in position b, the sun shines evenly on earth from pole to pole. earth is tilted toward the sun in position c. in position d, the sun shines evenly on earth from pole to pole.
public domain
point a
point b
point c
point d

the answer is point d

Explanation:I got it correct on the test.

hydroxyl -oh

alcohols, always polar, can form hydrogen bonds with h2o molecules

carboxyl -cooh  

cargoxylic acids, has acidic properties which is a source of hydrogen ions, found in cells in ionized for with a charge of oh-1

carbonyl > co

ketone if within skeleton, aldehyde if group is at the end of skeleton, k & a may be structural isomers, it determines 2 sugars (ketose & aldose)

amino -nh2

amines, acts as a base, it can pick up h+ ions from surrounding solution, ionized with charge of 1+

methyl ch2

addition to rna/dna affects and gene expression

phosphate -opo3 ²⁻

organic phosphates, contributes to negative charge to, molecule that it is a part of, and potential to react with h20

sulfhydryl -sh

thiols, cross-linking stabilize the protein, and it is structure

answer: the answer is b