Pioneer species such as lichen and moss inhabit an area after a major disturbance such as a volcanic eruption. Over time, other species are found in the disturbed area and the number of pioneer species decreases. Why does the number of pioneer species decrease?:quizzes

The correct answer is - The area has more soil to support complex plants. The competition decreases the pioneer species role.

Explanation:

Pioneer species are the initial species of organisms such as lichens and moss. These species appears in disturbed land where they break the rocks and at that time of their introduction to the area, there is enough amount of nutrition for their growth and survival.

After establishing the complex plant species these pioneer species are decreased due to the competition for the resources but due to enough soil and complex structure of the new plant species, they get very few minerals and other nutrition.

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

im not intirely sure but i think the anwser is d relative humidity