Terrestrial planets O all have satellites
are made of mostly rock and iron
O are made of mostly helium and hydrogen
are usually found outside the asteroid belt

Are made mostly out of rock and iron

Explanation:

The first one cant be correct because both Venus and Mercury don't have moons.

The planets made out of helium and hydrogen are gas giants.

Terrestrial planets are inside the asteroid belt.

So the answer has to be the second option of "Are made of mostly rock and iron"

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