Which of the following is/are important features of a weight system? The ability to quickly and reliably jettison at least enough weight to make the wearer positively buoyant at the surface or at depth. The ability to carry a minimum of at least 25 kg/55 lbs of weight. The ability to easily adjust the amount of weight used. Both the first and third answers are correct.

Both the first and the third answers are correct

Explanation:

Weighting systems are worn by divers to help balance the buoyant or upward thrust movement of the water on equipment such as the diving cylinders carried along with the diver during the dive,

A quick release mechanism can aid in the emergency rescue of a diver by dropping the weight to increase the diver's buoyancy so as to rapidly rise to the surface

The weighting system arrangement is such that part or all of the weight could be  removed to allow an immediate increase in the divers buoyancy

Therefore, both the first and the third answers are correct.

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

i would go with b

cytokinesis occurs after telophase so that eliminates d

and the entire reason for cytokinesis is for cellular reproduction