Question

1. Which of the following observations is true concerning the effect of body mass on demographics?

a. The higher the body mass, the higher the population density

b. The lower the body mass, the higher the population density

c. The higher the body mass, the higher the population size

d. The lower the body mass, the higher the population size

2. To determine population size in a population of immobile organisms such as plants, or for very small and slow-moving organisms, one could use:

a. A quadrat

b. Mark and recapture

c. Aerial surveillance

d. Their life table

e. The species distribution pattern

3. The size of a population has tremendous implications for the adaptability of future generation because of the importance of:

a. Food availability

b. Water availability

c. The ability of an individual to find a mate

d. Genetic diversity

4. The term used to describe the total number of individuals per unit area is the

a. life cycle

b. population size

c. population density

d. body mass

5. The maximum population size that a particular environment can sustain is referred to as the _________________.

6. Which of the following would be an example of an R-selected species?

a. Humans

b. Mice

c. Elephants

d. Cows

7. The top portion (leveling off) of the S-curve demonstrates the _________________.

a. R-selection

b. J-shaped curve

c. Exponential growth

d. Carrying capacity

e. Logistic growth

8. Weather, pollution, and natural disasters such as floods and fires are examples of density _______________________________ regulation.

9. The model of population growth in which population grows without any restriction on their growth is called ____________________________ growth.

a. Exponential

b. Logistic

c. Density dependent

d. Density independent

10. The model of population growth in which population growth will level off due to dwindling resource is called ______________________ growth.

a. Exponential

b. Logistic

c. Density dependent

d. Density independent

11. Which type of country is more likely to have a higher birth rate and higher proportion of young people than older people?

a. A country with zero population growth

b. A developed country

c. An underdeveloped country

12. Which of the following factors did NOT directly contribute to human population growth?

a. Education

b. Vaccination

c. Antibiotic usage

d. Sanitation

13. Human population growth is following:

a. An S-shaped curve

b. A J-shaped curve

c. Logistic growth

d. Zero population growth

14. Our large intestine serves as a home for millions and millions of bacteria, known as our normal flora. These bacteria live and thrive on our intestinal contents, especially on the cellulose which we cannot digest. In return, they suppress the levels of harmful bacteria and produce several forms of vitamins B and K. The relationship between us and the bacteria can be characterized as ___________________.

a. Amensalism

b. Parasitism

c. Commensalism

d. Mutualism

15. A massive forest fire devastated Yosemite National Park is 2013. The new growth which appeared the following spring is an example of __________________ ________________.

a. Keystone species

b. Foundation species

c. Climax community

d. Secondary succession

e. Primary succession

16. The otter is an example of a/an ________________ ___________________ in the Pacific Northwest. They feed in sea urchins, limiting their population. If the otters didn’t eat the urchins, the urchins would destroy the kelp. Kelp is giant seaweed, a major source of food and shelter for the ecosystem.

a. Foundation species

b. Keystone species

c. Climax community

d. Island biogeography

17. The number of vertebrate species in the Mojave Desert is estimated to be 380. This could be described as the __________________________ of the region.

a. Species richness

b. Relative species abundance

c. Foundation species

d. Climax community

18. When two species have population curves which increase and decrease in repetitive cycles, one slightly in advance of the other, it may be indicative of a ______________________ relationship.

a. Symbiotic

b. Parasitic

c. Commensurate

d. Predator-prey

19. Fat soluble compounds that are stored in the fat tissues of organisms, at ever increasing concentration as it moves up the food chain are serious threat because of ______________________________.  

20. In the food chain “grass --> grasshopper--> frog --> snake --> hawk”, grass is the ______________.

a. Producer

b. Secondary consumer

c. Tertiary consumer

d. Primary consumer

21. In the food chain “grass --> grasshopper--> frog --> snake --> hawk”, frog is the ______________.

a. Producer

b. Secondary consumer

c. Tertiary consumer

d. Primary consumer

22. When the primary source of energy is dead organic matter such as fallen leaves, plant parts or dead animal bodies, it is said to be a:

a. Climax community

b. Grazing food web

c. Food chain

d. Detritus food web

23. An autotroph which uses sunlight to produce its food is known as a __________________.

24. The trophic level of the food chain which has the least amount of energy would be the:

a. Tertiary consumer

b. Secondary consumer

c. Primary consumer

d. Producer

25. The term “trophic level” is best defined as the:

a. Water level

b. Size level

c. Energy level

d. Growth level

Answer 1

Human population growth is following:

b. A J-shaped curve because it is increasing day by day.

To determine population size in a population of immobile organisms such as plants, or for very small and slow-moving organisms, one could use:

a. A quadrat

Quadrat is a squariah or rectangular frame which is used to study the distribution patterns of small plants nd animals in a given area of known area.

4. The term used to describe the total number of individuals per unit area is the POPULATION DENSITY. It is calculated by totalling the number of individuals which are recorded in all the quadrats divides by the total number of quadrata used.

5. The maximum population size that a particular environment can sustain is referred to as the Carrying capacity.

6. Among the following would be an example of an R-selected species is the Mice

The R selected species have a short life span but they have a large number of offsprings.

7.The top portion (leveling off) of the S-curve demonstrates the Carrying capacity.

8. Weather, pollution, and natural disasters such as floods and fires are examples of density independent factors of population regulation. Because they occur naturally without depending upon the number of species.

9. The model of population growth in which population grows without any restriction on their growth is called the EXPONENTIAL GROWTH

10. The model of population growth in which population growth will level off due to dwindling resource is called as the Logistic Growth. Due to limitations in the availability of resources

11. The developed country is more likely to have a higher birth rate and higher proportion of young people than older people. Because of more medical facilities.

13. Human population growth is J shaped curve.

14. Our large intestine serves as a home for millions and millions of bacteria, known as our normal flora. These bacteria live and thrive on our intestinal contents, especially on the cellulose which we cannot digest. In return, they suppress the levels of harmful bacteria and produce several forms of vitamins B and K. The relationship between us and the bacteria can be characterized as MUTUALISM. because both the species are benefited.

15. A massive forest fire devastated Yosemite National Park is 2013. The new growth which appeared the following spring is an example of Secondary Successions.

16.

20. In the food chain “grass --> grasshopper--> frog --> snake --> hawk”, grass is the ______________.

a. Producer or the Primary Producer.

21. In the food chain “grass --> grasshopper--> frog --> snake --> hawk”, frog is the Secondary Consumer

22. When the primary source of energy is dead organic matter such as fallen leaves, plant parts or dead animal bodies, it is said to be a Detritus food chain.

23.

24. The trophic level of the food chain which has the least amount of energy would be the:

a. Tertiary consumer because of the 10% law

23.An autotroph which uses sunlight to produce its food is known as a Primary Producer.

25. The term “trophic level” is best defined as the: ENERGY LEVEL