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Essential English for Biology Students.doc
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VI. Give Russian equivalents to the following English terms:

English term

Russian equivalent

1

to over-run the planet

2

struggle for existence

3

selection pressures

4

environmental resistances

5

to expose to disease

6

changes in temperature

7

best suited to the environmental conditions

8

to give an advantage in …

9

the best chance of surviving and producing offspring

10

selective disadvantage

11

survival of the fittest

12

compared with other individuals

13

gradually change from generation to generation

14

to act on the phenotypes in a population

15

to become unable to interbreed

VII. Find synonyms among the pool of words:

Pool of words

Synonyms

1)1.offspring /2.struggle /3.change /4.progeny /5.battle /

6. alteration

2) 1.gradually /2.surroundings /3. steadily /4.environment

3) 1.population/ 2.resource/ 3.reduction/ 4.inhabitants/ 5.supply/ 6.decrease

4) 1.quickly/ 2.survive/ 3.superiority/ 4.fast/ 5.advantage/ 6.remain alive

VIII. Answer the following questions. Use all information given before:

1. What might lead to famine, pestilence and war?

2. What is called selection pressures?

3. What environmental factors do selection pressures include?

4. What organisms will have the best chance of surviving and producing their offspring?

5. Why does the difference in natality and mortality result in natural selection?

6. What is meant by “survival of the fittest”?

7. How is fitness defined in evolution?

8. What are three types of natural selection?

9. What is the difference between them?

IX. Match the sentence halves. Make complete sentences:

1.

Those organisms best suited to the environmental conditions, with characteristics that give them an advantage in the “struggle for existence”,

A.

although the populations of some species may be increasing at any one particular time.

2.

Environmental factors that keep populations in check

B.

results in natural selection.

3.

Darwin argued that this difference in natality and mortality

C.

from generation to generation in response to changes in the environment.

4.

In spite of reproducing quickly, no single species has completely over-run the planet,

D.

will have the best chance of surviving and producing offspring.

5.

The “fittest” individual in a population is the one that produces

E.

in an unchanging environment.

6.

Stabilising selection occurs

F.

are called selection pressures.

7.

Natural selection by “survival of the fittest” means that the genetic characteristics of a population gradually change

G.

the largest number of offspring that survive to reproduce themselves.

8.

Stabilising selection happens

H.

in the natural selection of birth mass in humans.

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