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

1 a portion of a gene contains the following sequence

1. A portion of a gene contains the following sequence: GAAGGAGTAGCA. After transcription, it gives the mRNA sequence: CUUCCUCAUCGU, which is then translated to the amino acid sequence leucine-proline-histidine-arginine. ...

First present the characteristics of water that make it

First present the characteristics of water that make it capable of hydrogen bonding. Then discuss why water is a good solvent and so readily exhibits capillarity. Finally, examine the heat properties of water, specifical ...

Looking for assistance with the below information regarding

Looking for assistance with the below information regarding alternatives to landfills.  References are needed. Alternatives to Landfills The use of sanitary landfills for burial of municipal solid wastes has been the pri ...

The splitting of white light into its constituent colours

The splitting of white light into its constituent colours passing through a prism is known as?

What is the relationship between the structure of a blood

What is the relationship between the structure of a blood vessel and blood pressure? What is the relationship between the structure of a blood vessel and blood velocity? Describe the pathway of urine from production to e ...

What does ph measure how do these measurements vary between

What does pH measure? How do these measurements vary between acids and bases? How do buffers work, in terms of pH? In terms of your body, are there varying levels of pH? If so, why is this?

Topic systemic pathophysiology of the respiratory and

Topic: Systemic Pathophysiology of the Respiratory and Gastrointestinal Systems Objective: Discuss a disease, condition or syndrome affecting the cardiovascular system and current research, events, or interesting facts a ...

Schedule slippage and delays are common for project

Schedule slippage and delays are common for project managers to manage. Experience contributes to a project manager's ability to address schedule impacts. Discuss how organizations can utilize the Learning Theory and Pro ...

Social unrest in west africa where sickle cell anemia is

Social unrest in West Africa, where Sickle cell anemia is most common, is forcing people to migrate to other countries. As a result, sickle cell anemia cases are rising in Europe and the US in recent years. Is the US pop ...

What is the process of dna replication please include

What is the process of DNA replication? Please include descriptions and possibly diagrams to further explain the process.

  • 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

WalMart Identification of theory and critical discussion

Drawing on the prescribed text and/or relevant academic literature, produce a paper which discusses the nature of group

Section onea in an atwood machine suppose two objects of

SECTION ONE (a) In an Atwood Machine, suppose two objects of unequal mass are hung vertically over a frictionless

Part 1you work in hr for a company that operates a factory

Part 1: You work in HR for a company that operates a factory manufacturing fiberglass. There are several hundred empl

Details on advanced accounting paperthis paper is intended

DETAILS ON ADVANCED ACCOUNTING PAPER This paper is intended for students to apply the theoretical knowledge around ac

Create a provider database and related reports and queries

Create a provider database and related reports and queries to capture contact information for potential PC component pro