B) Montreal Protocol (1987)

C) Clean Air Act (1970)

D) Resolution of International Earth Summit (1992)

In food webs (pyramids) a quantity of organisms as we move to higher trophic level

A) decreases

B) increases

C) does not change

D) changes in cyclic mode

5. Three essential types of biodiversity are all of the following EXCEPT

A) Genetic diversity

B) Population diversity

C) Ecological diversity

D) Species diversity

6. Heavy metals as toxic substances are classified as ________

A) teratogens

B) neurotoxins

C) carcinogens

D) mutagens

7. All the following are the examples of symbiotic relationships, EXCEPT

A) commensalism

B) competition

C) parasitism

D) mutualism

8. Biodiversity hotspots are located mostly

A) in Latin America

B) near South Pole

C) near the equator

D) in Africa

9. Population in developed North America is characterized by stable population growth rate mostly due to

A) low death rates

B) high birth rates

C) immigration

D) emigration

10. Which of the following results in population increase:

A) epidemic

B) pandemics

C) mortality

D) immigration

E) morbidity

11. In the diagram, which state of matter is represented by the letter C?

A) solid

B) plasma

C) gas

D) liquid

12. Poor people in rice-dependent countries are very likely to suffer from the deficit of the following nutrient

in their diet:

A) protein

B) vitamin C

C) iodine

D) vitamin A

13. The three crops that humans are most dependent on for nourishment are

A) corn, potatoes, and oats

B) oats, rice, and corn

C) corn, wheat, and rice

D) potatoes, wheat, and barley

E) rice, wheat, and soybeans

14. The average number of children born to each women during her reproductive lifetime is the

A) birth rate

B) biological productivity

C) biotic potential

D) total fertility rate

15. White bread and whole grain bread occupy the same level of Food Pyramid.

A) True.

B) False.

B. Fill in the blanks (0.5 x 2 = 1 pt):

1. _______________________ refers to the process of selective absorption and storage of toxins by living organisms.

2. _________________ are chemicals or other factors that cause abnormalities during embryonic growth and development.

C. Answer the following question (2 points):

Define EXTINCTION, main causes of extinction today. Give three examples of the species that are close to extinction. Which of them live in Kazakhstan?

is the end of an organism or of a group of organisms (taxon), normally a species. A species becomes extinct when the last existing member die

hunting, fishing,

Saiga, tiger, polus bear

D. Solve the following problem (2.5 points) :

Consider the following demographic data for Kazakhstan in 2006:

the country population at the beginning of 2006 was 15,233,240 people; the total number of births and

deaths for year 2006 was 242 thousand and 143 thousand respectively; net migration was equal to -51

thousand people. Find the following:

A) Annual population change for 2006.

B) Crude growth rate.

B) Rate of natural increase (in %).

Date: 2015-12-24; view: 848