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Evolution of group behavior | Evolution and natural selection | High school biology | Khan Academy

8,607 views

Khan Academy

Video Language:

  • English

Caption Language:

  • {{captionLanguage | language_name}} ({{captionLanguage}})

Accent:

  • English (US)

Speech Time:

99%
  • 4:12 / 4:14

Speech Rate:

  • 193 wpm - Fast

Category:

  • Education

Tags :

Intro:

Video Vocabulary

certain

/ˈsərtn/

adjective pronoun

Referring to an unspecified amount or quantity. some.

natural

/ˈnaCH(ə)rəl/

adjective adverb noun

Being as one would expect; being usual or normal. naturally. person having innate talent.

individual

/ˌindəˈvij(o͞o)əl/

adjective noun

single or separate. Single person, looked at separately from others.

produce
noun verb

agricultural products. make or manufacture.

because

/bēˈkəz/

conjunction

For a reason.

ecosystem

/ˈēkōˌsistəm/

noun

biological community of interacting organisms and their physical environment.

environment

/inˈvīrənmənt/

noun

Natural world in which plants and animals live.

genetics

/jəˈnediks/

noun other

study of heredity and variation of inherited characteristics. Studies of how things develop between generations.

primarily

/ˌprīˈmerəlē/

adverb

In the most basic or important way.

variant

/ˈverēənt/

noun

form or version of something that differs in some respect from other forms of same thing or from standard.

advantage

/ədˈvan(t)ij/

noun verb

A positive point about something. put in favourable position.

sometimes

/ˈsəmˌtīmz/

adverb

Only at certain times; occasionally.

chances

/CHans/

noun other verb

possibility. The possibilities that something will happen. To occur just through luck; happen.

changed

/CHānj/

verb

To go from one train, bus, etc. and go to another.

underlying

/ˌəndərˈlīiNG/

adjective verb

being cause or basis. Being the basis, foundation or cause of something.

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