Near the end of both March and September, a. spring begins in both hemispheres.
b. the sun's rays strike Earth with the same intensity everywhere.
Earth's axis is no longer pointing at the North Star.
d. neither end of Earth's axis is tilted toward the sun.
c.
Please select the best answer from the choices provided
Ο Α
OB
Ос

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

just go with your heart buddy

i know can you plzz me with this question im sorry i didt answer your question i just need hel.