BIO SCI 94 Lecture Notes - Lecture 2: Antimicrobial Resistance, Special Creation, Bird Migration

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29 Aug 2016

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BIO SCI 94 Full Course Notes

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Individuals in a population vary in their traits. Some of these differences are heritable: they are passed on to offspring. In each generation, many more offspring are produced than can survive: only some survive long enough to reproduce, some will produce more offspring than others. Individuals with certain heritable traits are more likely to survive and reproduce: natural selection occurs when individuals with certain traits produce more offspring than do individuals without those traits, the individuals are selected naturally, by the environment. Clicker question: according to the theory of special creation, species are ___. Clicker question: antibiotic resistance is a frequent problem in modern medicine. Darwin described evolution as descent with modification: change over time produced modern, modified species from ancestral species. The pattern component of the theory of evolution by natural selection predicts that: species change through time, species are related by common ancestry, and the process is ___. Individuals who survive pass on favorable traits to offspring.

Related Questions

1. Traits don't necessarily have to be passed on from parent to offspring for natural selection to act on them; traits that are environmentally acquired during the life time of an individual (such as practicing to become very strong or very fast) can also be acted upon by natural selection. Select one: True or False

2.Within the same species and even within the same population, not all individuals are the same. They vary in size, shape or other traits.

Select one:

True

False

3.Differential reproductive success means that some individuals in a population leave more offspring that survive and reproduce relative to other individuals in a population.

Select one:

True

False

coraldolphin670

Natural selection and evolution

Correctly complete the following paragraph to explain the relationship between natural selection and evolution.

Terms may be used more than once.

Within a population of fish, ____________ exists in the form of body color. Some fish are orange and some fish are red.

The fish population lives on an orange reef bed. Because of this, fish that are ____________ are able to blend in and resist predation.

Because fish that are ____________ are more likely to blend in and resist predation, they are more likely to survive to reproduce.

Fish produce ____________ offspring which ____________ the genes for body color.

After several generations, one can expect the fish population to have a ____________ portion of orange individuals compared to red individuals.

In this manner, ____________ is driving ____________ .

Choice of words:

natural selection

genetic variation

red

evolution

smaller

many

inherit

larger

orange

few

What set Darwin and Wallace's concept of natural selection apart from earlier ideas of evolution?

A) All of the above

B) Their concept suggested that life forms change over time, whereas earlier ones did not

C) Their concept included the idea that traits are passed on to offspring, whereas earlier ones did not

D) Their concept depended on a process by which differences in phenotypic traits cause some individuals to be more "fit" than others, depending on the environmental circumstances

BIO SCI 94 Lecture Notes - Lecture 2: Antimicrobial Resistance, Special Creation, Bird Migration

BIO SCI 94 Full Course Notes

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