I believe proteins would be the correct answer, but of course I just learnt this stuff 2 weeks ago. xD
<em>Answer: Chromosomes </em>
<em>Depending on the organism, the number of chromosomes in a cell may change.</em>
Mutations are like genetic mutations. Say a bird species may usually have a orange beak but one bird was born with blue, that’s a mutation.
Adaptations are things you adapt to like plant species have adapted over the year to receive less and less water to live.
Natural selection is basically ‘killing off’ the weaker ones. Say a bird species has broad wings but mutations happened over time leading them to have small wings that do not allow flight, they may eventually all die off due to that. Extinction is if al those birds were to die off from that mutation.
A lot of abiotic factors are necessary to the ecosystem, such as temperature, water, sunlight ect. ect.
Without these factors, certain animal species would not be able to prosper, and once adapted living organisms, would fail to get needed resources.
There can also be a negative affect.
Abiotic factors directly affect how organisms grow and survive.
Hope it helps :)