Select all of the following that must be true in order for evolution by natural selection to be taking place: (you may select multiple answers)

Group of answer choices

Survivability: some organisms in a population will survive, some organisms will not

Heritability: traits must be able to be passed down from parent to offspring

Catastrophe: something in the environment must change suddenly, like a natural disaster or introduction of a predator

Selection/Advantage: survival and ability to reproduce depend on an organism's traits

Desirability: at least some organisms in a population must want or need to change

Variability: individual organisms in a population must have traits that are different from each other, like fur color, number of leaves, or tail length

Blendability: genes need to be mixed between males and females

Mike was adopted, and his biological family history is unknown. although he is healthy, he would like some understanding of his genetic makeup, including potential health risks and genes that he could pass on to his children. mike has heard about commercial laboratories that can compare segments of your dna to those of people with common hereditary diseases in order to give you some idea of how susceptible you are to the diseases. the results of these types of tests are highly inconclusive. if mike's dna showed that he shares similarities in a segment of dna with people who have a given disease, his chances of developing that disease or passing it on to his children may be slightly elevated, but they are not 100 percent. these tests can cost more than $2,500 and are not covered by many insurance companies. do you think that mike should undergo the genetic tests? explain your answer. what are the potential pros and cons of having such tests done? describe how the availability of these genetic tests might affect the frequency of genetic diseases in individuals and populations.

Now it's your turn to investigate human impact around the world. grab your virtual lab coat and put on your environmental science hat. you will be taking a trip around the globe to explore three locations. at each location, you will investigate the cause and effect relationships of deforestation, desertification, and urbanization. you will also gather evidence of how these factors have impacted the environment over time

Rue or false siblings look simila rbecause they each have some traits of their parents.