Ask Biology Expert

1. Belle is studying a population of moose on an island and the shape of the population growth curve is S-shaped, with population size plotted on the vertical axis and time plotted on the horizontal axis. Likely what accounts for the flattening of the curve at the top?

A. Aging of animals so they no longer reproduce.

B. Shortage of resources, raising the death rate and lowering the birth rate.

C. Exponential growth.

D. Density suddenly lowered.

2. If a squirrel lives in a particular tree, that tree is the squirrel s

A. fundamental niche.

B. climax community.

C. habitat.

D. realized niche.

3. If a country were to experience a severe epidemic of AIDS, which of the following would be least likely to change?

A. birth rate

B. death rate

C. density

D. carrying capacity

4. Which of the following would be of least value in estimating carrying capacity for a duck population?

A. amount of food available

B. land area

C. water available

D. number of eggs produced per female

5. You are told that your community drinking water supply is dwindling due to inadequate amounts of groundwater. What is a likely cause?

A. Inadequate transpiration.

B. Consumption exceeds rainfall.

C. Pesticide poisoning.

D. Plants dying so water is not held on the ground.

6. Which of the following phrases IS NOT part of the definition of a biomes?

A. all of the living organisms on the earth

B. large ecosystems

C. easily recognized by their overall appearance

D. within specific climatic regions

7. Which of the following statements IS NOT true about phosphates?

A. Other than nitrogen it is more likely than any other required plant nutrient to limit plant growth.

B. It is present in the soil in a readily soluble form.

C. Phosphates exist in the soil only in small amounts.

D. Animals obtain the phosphorus they need by eating plants or other plant eating animals.

8. Bob is an ocean explorer who has traveled into the abyssal zone and has observed tube worms living around hydrothermal vents. What would be the ultimate source of nutritional energy in the food chain for these worms?

A. sulfur

B. heat

C. detritus

D. fish

9. What factor is most likely to determine distribution of animals living within an estuary, more so than within other aquatic habitats?

A. light

B. temperature

C. salinity

D. nutrients

10. Energy flows through an ecosystem

A. from the decomposers to the producers to the consumers.

B. from the producers to the decomposers to the consumers.

C. from the consumers to the producers to the decomposers.

D. from the producers to the consumers to the decomposers.

11. All of the following organisms are likely to be wiped out by a new disease or climate change EXCEPT for

A. organisms that have been selectively bred for specific characteristics such as hardiness.

B. organisms that have been cultivated to the exclusion of all other varieties or species of the same type.

C. organisms that are already endangered.

D. organisms with high genetic diversity.

12. Which invasive exotic has actually improved water quality in some of the areas they were transported?

A. zebra mussel

B. black bass

C. king shrimp

D. European green crab

13. Wild gorillas in Africa are show reduced genetic variability. This concerns scientists for the following reasoning

A. the number of alleles would increase to dangerous levels.

B. the inbreeding leads to hybrid vigor.

C. the population gains fitness because of the breeding of superior individuals.

D. the condition reduces their chances of adapting to environmental change.

14. African cheetahs are becoming less in number and are being forced into small geographic ranges. This situation can cause the following to happen to the cheetah population

A. an increase in the number of alleles for the population.

B. extinction.

C. an increase in the rate of mutations.

D. an increase in birth rates.

15. Which two extinction risks may be a direct result of the pet trade?

A. climate change and exotic species introduction

B. habitat loss and overharvesting

C. overharvesting and exotic species introduction

D. habitat loss and climate change

16. Global warming is most evident in the following observation

A. increased number of invasive species.

B. extinction of many amphibians.

C. spread of fungal diseases in frogs.

D. retreat of glaciers.

17. If global warming were to reduce rainfall from 100 cm annually to 20 cm annually in an area of taiga at 30 degrees north latitude (the latitude of central Florida), what kind of ecosystem would likely replace the taiga?

A. desert

B. dry rainforest

C. deciduous forest

D. arctic tundra

Biology, Academics

  • Category:- Biology
  • Reference No.:- M92398487
  • Price:- $20

Priced at Now at $20, Verified Solution

Have any Question?


Related Questions in Biology

Case study question -case study - mary 21 years old

Case Study Question - Case Study - Mary, 21 years old, presented to the hospital emergency department with an infected laceration on her left foot. Mary was at a beach resort four days ago, when she trod on a broken glas ...

Assignment -the upper-case blue letters are the 14th exon

Assignment - The upper-case, blue letters are the 14th exon (of 20) in the Hephl1 gene in mice. The lower-case (black) letters are from the flanking introns.  The highlighted bases indicate primers that may be used to ge ...

Question - a pure strain of mendels peas dominant for all

Question - A pure strain of mendel's peas, dominant for all seven of his independently assorting genes, was testcrossed. How many different kinds of gametes could the F1 PRODUCE?

Igfbp2 rbp4 and factor d post bariatric surgeryigfbp2 what

IGFBP2/ RBP4 and Factor D Post Bariatric Surgery IGFBP2 ( what the normal physiological action in the body? And how it affectedby obesity? andpost bariatric surgery?) RBP4 (what the normal physiological action in the bod ...

Assignment on nutrition - q1 task you need to select 2

Assignment on Nutrition - Q1. Task: You need to select 2 different age groups of your choice. You will need to plan balanced meals with snacks for a day. Once you have laid out the meal plan you need to: Explain why the ...

Question - gene cloning a please write the steps to clone

Question - Gene Cloning a) Please write the steps to clone the protease gene from Bacillus strain whose genome sequence is not known. b) Express the protease gene to obtain the enzyme in high yield, please plan your prot ...

Instructions address each question below as it relates to

Instructions: Address each question below as it relates to the caw study given. A patient was brought to the Emergency Department by ambulance with two arrow wounds. One arrow is still in the patient on the left side; en ...

Use of molecular tools and bioinforrnatics in the diagnosis

Use of Molecular Tools and Bioinforrnatics in the Diagnosis Characterization of Enteric Pathogens from a Case Study Purpose: The purpose of this project is to familiarize the student with modern molecular tools and bioin ...

Experiment 1 staining video1 open the media player by

Experiment 1: Staining Video 1. Open the Media Player by clicking on the film-strip button in the lower left of the lab's window frame, as shown below. The Media Player is a repository of images, videos, saved snapshots, ...

Chosen dr jan nolta- stem cell researcher head of uc davis

Chosen Dr. Jan Nolta- Stem Cell Researcher Head of UC Davis Stem Cell Program Director Topic Background: early Stem cells have the ability to develop into many different types of cells. Stem Cell Research is not without ...

  • 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

Why might a bank avoid the use of interest rate swaps even

Why might a bank avoid the use of interest rate swaps, even when the institution is exposed to significant interest rate

Describe the difference between zero coupon bonds and

Describe the difference between zero coupon bonds and coupon bonds. Under what conditions will a coupon bond sell at a p

Compute the present value of an annuity of 880 per year

Compute the present value of an annuity of $ 880 per year for 16 years, given a discount rate of 6 percent per annum. As

Compute the present value of an 1150 payment made in ten

Compute the present value of an $1,150 payment made in ten years when the discount rate is 12 percent. (Do not round int

Compute the present value of an annuity of 699 per year

Compute the present value of an annuity of $ 699 per year for 19 years, given a discount rate of 6 percent per annum. As