Which of the following must exist in a population before natural selection can act upon that population?

genetic variation among individuals More test answers on https://studyhippo.com/ap-bio-evolution-review/

Which of the following is an example of natural selection that has been seen in our lifetime?

the evolution of antibiotic-resistant bacteria More test answers on https://studyhippo.com/exam3-ch-13/

Which of the following is not an observation or inference on which natural selection is based?

Poorly adapted individuals never produce offspring More test answers on https://studyhippo.com/biology-chapter-22/

Charles Darwin’s theory of evolution by natural selection explains each of the following EXCEPT how

inherited traits are passed from parent to offspring. More test answers on https://studyhippo.com/combo-with-swaggy-and-1-other/

Darwin’s ideas on evolution were advanced for his time. His approach to science and natural selection were supported by what main tenant

Operation of natural laws produces constant change and improvement. More test answers on https://studyhippo.com/bio-ch-12-3/

Which one of the following was an assumption of Charles Darwin’s theory of natural selection?

Populations produce more offspring than their environment can support. More test answers on https://studyhippo.com/exam3-ch-13/

What was one of the reasons that the principle of natural selection was slow to catch on?

Nobody understood how traits could be reliably passed on through generations. More test answers on https://studyhippo.com/biology-chapter-16-review-questions/

What did Darwin hope to learn about Natural selection by studying pigeons?

He wanted to learn whether you can possibly change the whole species following. More test answers on https://studyhippo.com/10-3-theory-of-natural-selection/

Hypoxia has been shown to be an agent of natural selection because Tibetan women

with alleles for high oxygen saturation in their hemoglobin had more surviving children More test answers on https://studyhippo.com/anthropology-midterm-2/

How did Darwin come up with his theory of evolution by the process of natural selection?

Lamarck suggested that species could change and explained evolution through a natural process More test answers on https://studyhippo.com/evolution-study-guide-answers/

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Natural Selection Flashcards, test questions and answers

Discover flashcards, test exam answers, and assignments to help you learn more about Natural Selection and other subjects. Don’t miss the chance to use them for more effective college education. Use our database of questions and answers on Natural Selection and get quick solutions for your test.

What is Natural Selection?

Natural selection is the process by which certain traits become more or less common in a population over time due to their effects on survival and reproduction. Natural selection occurs when individuals with certain characteristics have an advantage in surviving and reproducing, while those without them are at a disadvantage. This process of natural selection leads to changes in the frequency of particular genes within the population over generations, resulting in evolution. The underlying mechanism of natural selection is differential reproductive success; that is, some individuals will reproduce better than others because of their advantageous traits. For example, if there is a trait among individuals that increases their chances of obtaining food, then these individuals will be able to produce more offspring than those without this trait. As time passes, more and more members of the population will possess this trait as it becomes increasingly beneficial for survival. Thus, over generations this particular gene or allele will become increasingly common in the population due to its increased prevalence among successful reproducers hence why it is called â€˜natural’ selection. Natural selection can occur both through environmental pressures (e.g., natural disasters) as well as through competition between species for resources such as food and space (i.e., interspecific competition). It can also take place within species due to differences in phenotype (i.e., intraspecific competition) for instance when one group outcompetes another group for limited resources like food or mates leading to different levels of reproductive success between them. In summary, natural selection is the process by which advantageous traits increase in frequency within populations over time due to their beneficial effects on survival and reproduction rates compared to other members who lack those traits; ultimately leading to evolutionary change across successive generations.