<span>A millimeter is 1/1000th of a meter, and a micrometer is 1/1000th of a millimeter.</span>
Answer: If it is almost impossible for a favorable trait to get passed down to offspring due to reproductive struggles, the species would not be able to undergo natural selection due to a lack in appearance of a trait.
Explanation:
If there are only two organisms with the adaptation, both of which lack any reproductive abilities, the odds of most of the species <em>not</em> dying out are very low. Only those two will have the adaptation and they rest will die out.
I hope I helped! :)
Phenotypes. Phenotypes are a type of physical traits.
Not just solar but also Radiation and thermal.