Ask Question, Ask an Expert


Ask Biology Expert

1) Americans use about __________ times as much energy as the world average.
A) 20 B) 1.5 C) 5 D) 10 E) 2

2) Rabbits were introduced to Australia about 100 years ago for the purposes of hunting. They have been multiplying, eating up the native vegetation, and destroying the native habitat of other small animals, ever since. In the 1950s, in order to control the rabbit population, government scientists released the myxomatosis virus. The virus, which dramatically reduced the rabbit population, is an ex of
A) a predator.
B) a parasite.
C) the effect of migration on growth.
D) a cyclical pattern of growth.

3) Environmental resistance is a limit imposed on population growth by
A) birth rates.
B) the abiotic environment only.
C) both the biotic and abiotic environment.
D) the biotic environment only (predators, competitors).
E) death rates

4) Which BEST describes the reason for the very rapid growth of the human population in the last 8,000 years?
A) Humans have few offspring but their young survive at a high rate
B) Technology has allowed the species to overcome some environmental resistance.
C) Climatic change has allowed the human species to expand its range.
D) The biotic potential for humans has increased.
E) Environmental resistance does not apply to humans.

5) If similar species each occupy a smaller niche when they live together than they would if they lived alone, they are said to be
A) partitioning resources.
B) coevolving.
C) increasing niche overlap.
D) involved in succession.

6) Which of the following is NOT likely to characterize pioneer plant species involved in primary succession?
A) produces many small seeds that can travel great distances
B) slow-growing, long-lived perennial
C) able to tolerate low nutrient levels
D) able to tolerate intense sunlight
E) small size

7) In the process called __________ , predator and prey species act as agents of natural selection on each other.
A) commensalism
B) coevolution
C) succession
D) competition
E) symbiosis

8) Phosphorus, which is very commonly a limiting nutrient in ecosystems, is very important because it
A) evaporates quickly.
B) is found only in sedimentary rocks.
C) is part of the hydrologic cycle.
D) is necessary for the production of cellulose so that autotrophs can grow and provide food for heterotrophs.
E) is needed for molecules such as ATP, cell membranes and nucleic acids.

9) Which best illustrates the movement of energy through an ecosystem?
A) food web
B) trophic chain
C) nutrient cycles
D) biological magnification
E) food chain

10) Which of the following factors is (are) frequently limiting in terrestrial environments?
A) water
B) oxygen and nutrients
C) both water and appropriate temperatures
D) appropriate temperatures
E) nitrogen gas

11) Which of the following is NOT a characteristic of a tropical rainforest?
A) high temperatures
B) very high species diversity
C) arboreal animals
D) vegetation grows in layers
E) fertile soil

12) When succession occurs after a field is abandoned in the southeastern U.S., the rich soil and intense sunlight initially allow fast-growing annual species such as __________ to thrive.
A) ragweed and crabgrass
B) tulip poplars and sweetgum
C) oaks and maples
D) mosses
E) pine trees

13) If a wolf eats a rodent that ate a smaller insect that ate a plant, the wolf would be a(n)
A) primary producer.
B) tertiary consumer.
C) secondary consumer.
D) primary consumer.
E) autotroph.

14) Eutrophic lakes have
A) very little productivity.
B) clear water.
C) few phytoplankton.
D) high nutrient levels.
E) high oxygen concentrations in deep water.

15) An important density-independent factor limiting population size is __________.
A) weather
B) competition
C) predation
D) food quantity
E) environmental resistance

16) Over the past century, sagebrush has dramatically expanded its range over the Colorado Plateau's grasslands. This has been attributed to the overgrazing of the area's grasses by cattle and sheep. This ex indicates that
A) grazing has no effect on the distribution of plants.
B) the relationship between sagebrush and grasses is mutualistic.
C) sagebrush is the dominant competitor over grasses.
D) the range of sagebrush is normally limited by competition with grasses.
E) sagebrush could not exist anywhere in the absence of cattle and sheep.

Biology, Academics

  • Category:- Biology
  • Reference No.:- M926239

Have any Question? 

Related Questions in Biology

Q1 you have crossed true breeding purple peppers aabb with

Q1. You have crossed true breeding purple peppers (AABB) with true breeding yellow peppers (aabb). The resulting F 1 progeny were all purple. When you intercrossed two of the F1 plants, you got the following results: 26 ...

Assignmentappendix c organizational requirements for

Assignment Appendix C: Organizational Requirements for Phototropism Virtual Laboratory Paper Introduction: Provide readers with the experiment's background information, and present the hypothesis in approximately 175 wor ...

Question 1 in drosophila melanogaster eyeless ey is a

Question 1: In Drosophila melanogaster, eyeless (ey) is a recessive trait in which the eyes are tiny or absent. The ey locus is found on chromosome 4. Monosomy and trisomy for this very small chromosome are compatible wi ...

Assignmentinstructions1 discuss the function in detail of

Assignment Instructions: 1. Discuss the function in detail of each of the following RNA polymerase II transcription factors. TFIIB TFIIE TFIIF TFIIH 2. What additional role does one of the subunits of TFIIH have during t ...

Discussion 1 and 2discussion 1- explain the difference

Discussion 1 and 2 Discussion 1- Explain the difference between the first and second line of body defenses against infection by pathogens Discussion 2- Identify the function(s) of the lymphatic system. Identify one diffe ...

Experimental design for biologists reflectioninstructions

Experimental Design for Biologists Reflection Instructions: Read Ch. 22 only pg 137-146 & 152-154, Read Ch. 23 only pg. 155-162. (I suggest you skim the other examples and read them if they seem relevant to your project. ...

Assignment- applicationyou are responsible for creating

Assignment- Application You are responsible for creating your own answers. I have given you the information you need in previous lectures (from what I wrote on the board) for you to answer the questions. Also, some of th ...

Experiment 4 exercise 1 mitosis in a plant cellread through

Experiment 4 Exercise 1: Mitosis in a Plant Cell Read through the Experiment 4 Introduction material before starting. In this exercise we will look at the different stages of mitosis in onion cells. The length of the cel ...

Part a answer each of the following questions in one or two

Part A: Answer each of the following questions in one or two paragraphs. 1. Create two Punnett squares to display the outcome of the Fl generation and F2 gener¬ation from one of Mendel's experiments with pea plants. Use ...

1 the results of the study of the occurrence of

1. The results of the study of the occurrence of tuberculosis (TB) in a village in Malawi are given in the table below. All individuals in the village were examined during two surveys made two years apart. Assume that th ...

  • 4,153,160 Questions Asked
  • 13,132 Experts
  • 2,558,936 Questions Answered

Ask Experts for help!!

Looking for Assignment Help?

Start excelling in your Courses, Get help with Assignment

Write us your full requirement for evaluation and you will receive response within 20 minutes turnaround time.

Ask Now Help with Problems, Get a Best Answer

A cola-dispensing machine is set to dispense 9 ounces of

A cola-dispensing machine is set to dispense 9 ounces of cola per cup, with a standard deviation of 1.0 ounce. The manuf

What is marketingbullwhat is marketing think back to your

What is Marketing? • "What is marketing"? Think back to your impressions before you started this class versus how you

Question -your client david smith runs a small it

QUESTION - Your client, David Smith runs a small IT consulting business specialising in computer software and techno

Inspection of a random sample of 22 aircraft showed that 15

Inspection of a random sample of 22 aircraft showed that 15 needed repairs to fix a wiring problem that might compromise

Effective hrmquestionhow can an effective hrm system help

Effective HRM Question How can an effective HRM system help facilitate the achievement of an organization's strate