BLG 143 Final: BLG143 - Chapter 1: Biology and the tree of life

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violetwolf810

5 Oct 2017

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Organism: form of life, a living entity made up of one or more cells (cellular). Cells (cell"s membrane regulates the passage of materials between exterior/interior spaces) A theory of natural selection: a process fundamental to evolution as described by. By natural selection, any characteristic of an individual that allows it to survive to produce more offspring will eventually appear in every individual of the species, simply because those members will have more offspring. Individuals in a population vary in traits are heritable: traits can be passed on to off- spring. (population is a group of individuals of same species that live in the same area at the same time) In a popular environment, some of these species heritable traits help individuals survive better or reproduce more than the other versions. It is a graphical representation of the evolutionary relationships between species. It can be estimated by analyzing similarities and differences in traits.

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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

What is NOT a requirement for evolution by natural selection to occur?

a) Traits must be inherited

b) Traits must influence reproductive success

c) Inherited traits must have variation within the population

d) Characteristics that are favored (fitness) relate to the immediate environment

e) Variations will appear that will allow the survival of the species in future, unforeseen, circumstances.

Charles Darwin...

a) ... arrived at the idea of natural selection in the GalÃ¡pagos Islands.

b) ... was the first scientist to suggest evolution.

c) ... claimed that only aggressive and strong individuals would survive and reproduce.

d) ... with Alfred Wallace, published a mechanism for adaptive change, natural selection, and proposed a "tree of life".

e) ... argued that chimpanzees and gorillas were progressively evolving into human beings.

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

BLG 143 Final: BLG143 - Chapter 1: Biology and the tree of life

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