Tag Archive | "Science"

Envioremental Science Test?!?


1.) A population migrated to a new area where there was little competition. The population increased quickly for a period of time and then leveled off. Which statement best explains why the population changed very little after it leveled off?
A.) another species occupied the same niche
B.) the amount of food available stayed the same
C.) the producer population increased
D.) a predator moved out of the area
2.) If humans remove carnivores from an ecosystem which of the following will happen first?
A.) the producers will increase
B.) the population of herbivores will increase
C.) the population of herbivores will grow beyond carrying capacity
D.) fungus will fill the empty niche
3.) Which statement describes forest stratification?
A.) many organisms live in a forest
B.) the forest is divided into layers of different heights
C.) trees will change location
D.) different trees grow in different forests
4.) When certain pesticides are sprayed there is often a large increase in the population of spider mites. which of the following statements best explains this outcome?
A.) the spider mite feeds on pesticide
B.) the pesticide kills the spider mite
C.) the pesticide doesnt kill insects
D.) the insecticide kills the predators of the spider mite
5.) Three species of mice live in the same field. Which best explains the reason they do not compete over resources?
A.) they share food with each other
B.) the mice are able to make their own food
C.) the field has a limited supply of food
D.) the mice occupy different niches
6.) When a population lives in a n environment with limited resources the most likely result is
A.) intraspecific competition
B.) that the population will become extinct
C.) a new population will immigrate to the environment
D.) the population will make new resources
7.) Different plants are able to occupy different areas of a forest because they have different needs for
A.) oxygen
B.) wind
C.) light
D.) carbon dioxide
8.) An organisms relationship to an ecosystem is its
A.) niche
B.) resource
C.) biomass
D.) adaptation
9.) Geographic Information Systems (GIS) can be used by population biologist to
A.) produce more resources
B.) map the areas in which populations live
C.) grow crops
D.) destroy ecosystems
10.) Invasive species can overtake an ecosystem because they
A.) have no natural enemies
B.) are stronger than native species
C.) have natural protection
D.) make their own niche
Short Answers
In one suburban community the deer population has grown much too large. The deer are found in areas near homes and on busy streets. There have been many proposals to reduce the deer population. One method proposed is the ‘bait and shoot’ method, in which food is placed out as deer bait, then a certain number of deer are killed each year.
11.) State two possible reasons the deer population has grown so large. [4]
________________________________________…
________________________________________…
12.) Describe one problem the deer may cause in the community. [2]
________________________________________…
________________________________________…
13.) How is the bait and shoot method similar to population control in nature? [2]
________________________________________…
________________________________________…
14.) State one possible problem with the bait and shoot method. [2]
________________________________________…
________________________________________…
15.) Two other proposed methods for population control are:
> trapping and relocating some deer
> treating the deer with birth control drugs
For each of these methods, suggest one possible reasons it was not chosen. [4]
________________________________________…
________________________________________…
16.) This is one pond food chain
algae —> rotifer —-> worms —> fish
Describe what will happen to the other three populations if the worm population decreases.
Give one reason for the change in each population. [6]

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I Need Science Help Please?


1. Most of the loss of biodiversity in ecosystems is caused by _____.
A water pollution
B illegal poaching
C infectious disease
D habitat destruction
2. When stores put products on sale, they are seeking to _____.
A increase demand for the product
B increase the product’s value
C sacrifice profits
D increase the product’s supply
3.Intervention by the federal government is necessary when local environmental policies and actions _____.
A exceed federal standards
B cannot be implemented
C are too expensive
D affect people in other states
4.Most home energy use goes toward _____.
A. heating and cooking
B. heating and hot water
C. hot water and appliances
D. washing clothes and cooking
5.Which describes a gene bank?
A. a secure place where seeds, plants, and genetic material are stored
B. an institution that provides funding for genetic research of endangered species
C. a place where endangered species are undisturbed by humans
D. the part of the cell that stores a blueprint for an organism’s traits
6.The lowering of the overall demand for a resource is called _____.
A. source recycling
B. conservation
C. source reduction
7.Developing nations complain that international environmental policies proposed by developed nations are almost always motivated by _____.
A. self-interest
B. contempt
C. religion
D. charity
8.Agenda 21, agreed to by participants at the Earth Summit, provides guidelines for _____.
A. sustainable development
B. preserving species
C. reducing CFCs
D. protecting forests
9.In today’s pattern of extinction, the generation of new species is unlikely because _____.
A. alien species occupy important niches
B. key animal species are being destroyed
C. most plant species are being destroyed
D. entire ecosystems are being destroyed
10.A sustainable society is based on _____.
A. demand for resources
B. conservation of resources
C. increasing wilderness areas
D. zero pollution
11.The United States buys $5 billion worth of rainforest beef each year.
Rain forest destruction is thus encouraged because _____.
A. rain forests are cleared to graze cattle
B. rainforest animals are forced to compete with cattle for food
C. rainforest soil is contaminated by cattle wastes
D. rainforest plants are consumed by cattle
12. In the last century, the extent of global rain forests has been reduced by _____.
A. one-third
B. one-tenth
C. one-fourth
D. one-half
13.The Endangered Species Act has been criticized for its emphasis on protecting only _____.
A.ecosystems
B. species
C. biomes
D. habitats
14. The products in our society that contribute the most waste are those that are _____.
A. disposable
B. aluminum
C. biodegradable
15. Why are scientists concerned that currently unknown medicinal plants may never be discovered?
A. Habitats are being destroyed faster than the plants can be discovered.
B. Current technology is unable to detect their medicinal benefits.
C. The plants’ habitats are so remote that they cannot be reached.
D. Domestic versions of the same plants will outcompete them.
16.Extinction results in _____.
A. many new animals moving into a habitat
B. greater opportunities for generalist species
C. loss of ecosystem biodiversity
D. fewer niches within ecosystems
17.Which does not lead to expansion into the rain forests of developing nations?
A. drilling for fossil fuels
B. overcrowding in cities
C. demand for rainforest products
D. shortage of food sources

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Homework Help Science!!!!!!!?


1.
Organisms that eat plants in a food chain are called _____. (1 point)
primary consumers
producers
secondary consumers
decomposers
2.
All energy flowing through living systems on Earth can be traced back to the _____. (1 point)
plant population
sun
oceans
animal populations
3.
Floods, droughts, or cold spells affect the _____ of an ecosystem. (1 point)
abiotic factors
balance
materials
niche
4.
Ecologists count the number of frogs living in a pond community to determine the _____. (1 point)
balance
limiting factors
organisms
population density
5.
The tree a squirrel lives in is its _____. (1 point)
community
ecosystem
habitat
niche
6.
A part of the biosphere that contains a living and nonliving part is called a(n) _____. (1 point)
abiotic factor
ecosystem
habitat
organism
Use the figure below to answer questions 7–8.
coral reef ecosystem
7.
On the coral reef ecosystem figure shown, which factor is biotic? (1 point)
rocks
sand
sea horse
water
8.
On the coral reef ecosystem figure shown, which factor is abiotic? (1 point)
algae
sharks
rock
sea horses
9.
An organism’s specific role in an ecosystem is called its _____. (1 point)
function
niche
job
position
10.
A factor that prevents a populations from increasingly indefinitely is called a(n) _____. (1 point)
biotic factor
limiting factor
abiotic factor
preventative factor

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Is Dolphin(pg)institute Of Bio Medical And Natural Science Is A Best College For Pursuing Msc Microbiology?


IS DOLPHIN(PG)INSTITUTE OF BIO MEDICAL AND NATURAL SCIENCE IS A BEST COLLEGE FOR PURSUING MSC MICROBIOLOGY OR MSC BIOTECHNOLOGY OR MSC INDUSTRIAL BIO TECHNOLOGY OR MSC MEDICAL MICROBIOLOGY??
AM A FINAL YEAR STUDENT OF ZOOLOGY FROM EIILM UNIVERSITY,SIKKIM..
1.SHOULD I APPLY FOR ABOVE PG COURSES ??
2.WHICH COURSES WILL BEST FOR ME..?
3.IS THIS COLLEGE IS GOOD AND REALLY AFFILIATED BY H.N.B. GARWAL CENTRAL UNIVERSITY??
4.PLACEMENT OF THOSE SUBJECTS ARE GOOD??
5.WHICH COURSE IS BEST AFTER ZOOLOGY FROM ABOVE COURSE??
6.IF IS THIS NOT A GOOD COLLEGE WHICH COLLEGE WILL BE GOOD OR DIRECT UNIVERSITY??
I REQUESTING ALL OF MY WELL WISHERS PLEASE TELL ME AND SUGGEST ME THE BEST..I AM REALLY HELP LESS …PLEASE GIVE ME ALL INFORMATION ABOUT COURSES AND COLLEGES???AND ALSO WHICH I MENTION ABOVE…
I NEED UR VALUABLE SUGGESTIONS AND ANSWERS ..
THANKS ,
JOY DAS
WEST BENGAL

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Major In Computer Science Or Accounting?


I am a high school student and I have narrowed my choices of potential college majors to these two: Computer Science and Accounting.
I have interests in both, and some recommended an MIS major. I researched it a bit and MIS seems to lack competitive qualities versus a computer science degree. It also has one of the highest unemployment rates [MIS.].
I have an interest in economics; both the quantitative areas as well as historical concepts of the subject. I chose to consider accounting over economics due to better employment opportunities and how lucrative the degree can be. I plan to get an MBA or Master’s in Economics after some work experience. Then, a CPA after I get enough credit hours.
I was wondering if anyone could help me decide. I’m interested in both, and deciding on one has been stressing me out lately.
Computer Science offers fantastic employment and salary opportunities, but I am afraid of the math difficulty. Technology and its effect on the world has captured my interest. I’m an introverted type, so I thought this would be a good niche. I like mathematics, as I do very well, but I’m not the best of the best in the subject, and I don’t want it to consume my whole major. I like history, and I hate chemistry very much. So, I’m unsure about this. There’s the possibility of age discrimination as I get older as well…
Also, I have absolutely no programming experience whatsoever. I don’t seem to have any time to learn it on the side because I am in the International Baccalaureate. Also, my school doesn’t offer any programming classes.
I noted that a lot of computer science grads have great starting salaries, but usually cap at about $120k. This is still amazing, but I feel that accounting could possibly have better opportunities for salary growth. CFO, Director, etc.
Accounting supports my interest in the systems of a business and working with numbers. It also seems easier to get a stable job, as the only certifications to get are CPA, CMA, etc. and while hard, it beats having to get a plethora of certifications in several different programming languages or applications, etc. that will eventually become obsolete in a computer science type job. As I previously noted, I am also interested in economics, and I’ll probably take some business economics electives. The careers in accounting are a mixed bag. Some say that its a great choice and their work / life balance is good and they receive fantastic salaries. Others say it’s the worst decision they’ve ever made because of no work / life balance, stressful deadlines, and crappy salaries. So I’m confused with that.
Then there’s the fact that my parents and siblings will look down on me for majoring in something as “unfulfilling and boring” [their words] as accounting. -_-
I want to be a benefit to society, rather than a leech or crook, like some of the people who currently run it. I want to benefit humanity through my work.
So please, help me decide! I’m pretty stressed out about which one to choose.

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Help Science Hw Have No Idea?


I’m in 7th grade doing this lesson review and I’m stuck on two questions on ecology.
1.) How do the populations in a community depend on each other?
2.) owls and hawks both eat rodents. They are also found in the same habitats. Since no two populations can occupy exactly the same niche how can they both coexists.
A reminder I’m in 7th so the answer doesn’t have to be all big and super explanatory or if you can at least guide me

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