Tag Archive | "living organisms"

Is It True That Males, In General, Are Naturally More Competitive Than Females?


Competition in biology, ecology and sociology is a contest between organisms, animals, individuals, groups, etc. for territory, a niche, or a location of resources, for resources and goods, for prestige, recognition and awards, for mates and group or social status, for leadership; it is the opposite of cooperation. It arises whenever at least two parties strive for a goal which cannot be shared or which is desired individually but not in sharing and cooperation. Competition occurs naturally between living organisms which co-exist in the same environment. For example, animals compete over water supplies, food, mates, and other biological resources. Humans compete usually for food and mates, though when these needs are met deep rivalries often arise over the pursuit of wealth, prestige, and fame. Competition is also a major tenet in market economy and business is often associated with competition as most companies are in competition with at least one other firm over the same group of customers, and also competition inside a company is usually stimulatied for meeting and reaching higher quality of services or products that the company produce or develop.

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Science Biology Hw Help!plz!!?


The study of the interaction of living organisms with each other and with their physical environment is called
A ecology. B health.
C geology. D economy.
2. A group of organisms of different species living together in a particular place is called a
A habitat. B community.
C biome. D population.
3. All organisms in an ecosystem are linked together in a network of interactions. This quality is called
A geochemical processes. B isolation.
C communication. D interdependence.
4. Ecological models are useful for all of the following purposes except
A evaluating proposed solutions to environmental problems.
B testing predictions about future ecological changes.
C making predictions about future ecological changes.
D accounting for all the variables that exist in a real environment.
5. The specific physical location in which a given species lives is called its
A climate. B habitat.
C community. D abiotic factor.
6. The areas of an organism’s tolerance curve that lie at the extreme high or low for an environmental variable represent the
A optimal range of the environmental variable for the organism.
B zones of efficient performance by the organism.
C range of the environmental variable preferred by the organism.
D zones of poorest performance by the organism.
7. Which of the following is not an way that organisms deal with unfavorable environmental conditions?
A dormancy B body temperature regulation
C interdependence D migration
8. An organism’s niche includes
A what it eats. B where it eats.
C when it eats. D All of the above
9. Which of the following would not be included in a description of an organism’s niche?
A when it reproduces
B its trophic level
C its number of chromosomes
D the humidity and temperature it prefers
10. Organisms that manufacture organic nutrients for an ecosystem are called
A consumers. B predators.
C omnivores. D producers.
11. cows : herbivores ::
A algae : consumers B plants : producers
C horses : carnivores D caterpillars : producers
12. When an organism dies, the nitrogen in its body
A can never be reused by other living things.
B is immediately released into the atmosphere.
C is released by the action of decomposers.
D All of the above
13. Refer to the illustration above. The photosynthetic algae are
A decomposers. B producers.
C parasites. D consumers.
14. Refer to the illustration above. The diagram, which shows how energy moves through an ecosystem, is called a
A habitat net. B food chain.
C food web. D trophic level.
15. Refer to the illustration above. Among all of the food chains, the organisms at the highest trophic level are
A the krill. B the crabeater seals.
C the algae. D the killer whales.
16. In a food web, which type of organism receives energy from every other type?
A producer B carnivore
C decomposer D All of the above
17. Refer to the illustration above. On the pyramid, animals that feed on plant eaters are no lower than
A level 4. B level 1.
C level 3. D level 2.
18. Refer to the illustration above. How much energy is available to the organisms in level 3?
A all of the energy in level 1 plus the energy in level 2
B all of the energy in level 1 minus the energy in level 2
C about 90 percent of the energy in level 2
D about 10 percent of the energy in level 2
19. In an ecological energy pyramid, animals that feed on plants are at least in the
A third trophic level. B second trophic level.
C first trophic level. D fourth trophic level.
20. The number of trophic levels in an ecological energy pyramid
A never exceeds three.
B is limitless.
C is impossible to count because energy is lost at each trophic level.
D is limited by the amount of energy that is lost at each trophic level.
21. In going from one trophic level to the next higher level,
A the number of organisms increases.
B the amount of usable energy increases.
C the amount of usable energy decreases.
D None of the above
22. Refer to the illustration above. At each trophic level, the energy stored in the organisms in that level is
A about 10 percent of the energy in the level below it.
B about 10 percent of the energy in the level above it.
C about 50 percent of the energy in the level above it.
D about 50 percent of the energy in the level below it.
23. Water and minerals needed by all organisms on Earth pass back and forth between the biotic and abiotic portions of the environment in a process called
A a biogeochemical cycle.
B a trophic pathway.
C a trophic cycle.
D a biochemical pathway.
24. Precipitation and evaporation are important components of the
A nitrogen cycle. B water cycle.
C carbon cycle. D All of the above
25. In the nitrogen cycle, plants use nitrates and nitrites to form
A proteins and nucleic acids. B ammonia.
C fats. D nitrogen gas.

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6 8th Grade Science Questions??? Multiple Choice And 2 Short Written Answer?


1. What is the function of a producer in a food chain?
.to consume energy from various plants and animals in the food chain
.to break down essential nutrients and return them to the soil
.to create energy-rich molecules, such as glucose
.to create symbiosis in an ecosystem
2. The role a species plays within a community is its
.niche.
.habitat.
.population.
.ecology.
3. The relationship in which one species benefits and the other is unharmed is known as
.a niche.
.commensalism.
.mutualism.
.parasitism.
4. Population size is limited by all of the following except
.biotic factors.
.abiotic factors.
.competition.
.All of these can limit population size.
5. The _________________ is the part of Earth’s crust, water, and sky that supports living organisms. (1 point)
6. Using all the terms provided here, construct a food chain of your own. Make sure to show the flow of energy in your food chain. Terms to use include producer, herbivore, carnivore, omnivore, and decomposer. (1 point)

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What Are The Answers To These Questions?


My professor assigned 100 questions for us to answer and study off of and I have had trouble with these following questions. I would greatly appreciate any imput.
An ecosystem
A. includes only the plants within a particular area.
B. includes all the living organisms within a specific area, but not the abiotic factors.
C. includes both living and abiotic factors within a particular region.
D. always includes equal numbers of plant and animal species.
E. only refers to biotic factors in a region.
The physical space that an organism occupies in its environment is its ______________.
A. habitat
B. niche
C. biotic factor
D. role
E. abiotic factor
A keystone species is
A. the largest species in a community.
B. the most numerous species in a community.
C. the least numerous species in a community.
D. a species on which many other species depend.
E. the species that occupies most of the niches within a particular environment.
Which of the following is an incorrect association regarding interactions within communities?
A. habitat–area of community where a particular species lives
B. parasitism–one species obtains nutrients from another
C. mutualism–relationship benefits both species
D. commensalism–one species benefits and one species is harmed by the
E. predation–one species feeds on another
An exotic species is defined as a species that is
A. illegal to sell.
B. a poor competitor for nutrients.
C. a hybrid.
D. indigenous to an area.
E. non-native to a particular community.
Which of the following is an incorrect statement?
A. Plants are Decomposers that live on dead organic matter.
B. Autotrophs are called producers because they produce food.
C. Herbivores eat algae or plant material.
D. Detritus includes both living and non-living material.
E. Chemoautotrophs obtain energy from inorganic compounds.
Which of the following is an incorrect association?
A. trophic level–level of nourishment within a food chain
B. sedimentary cycle–chemical absorbed from soil and eventually returned to soil
C. food chain–a diagram showing a single path of energy flow in an ecosystem
D. ecological pyramid–energy gain between trophic levels
E. grazing food web–begins with plants
Which of the following biomes has the higher primary productivity?
A. temperate grassland
B. desert
C. temperate deciduous forest
D. coral reef
E. sandy beach
When too many nutrients are added to of a body of water, this is known as __________.
A. A biogeochemical cycle
B. reservoirs
C. eutrophication
D. global warming
E. nitrogen fixing
Which of the following is an example of a sedimentary cycle?
A. the phosphorus cycle
B. the nitrogen cycle
C. the carbon cycle
D. the atmospheric cycle
E. eutrophic cycle
Biomes are defined by
A. types of plants.
B. types of animals.
C. communities.
D. temperature and rainfall.
E. both plants, animals, and inorganic matter.

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Simplify These Definitions Please..easy 10 Points!?


Carbon cycle: Ecology The combined processes, including photosynthesis, decomposition, and respiration, by which carbon as a component of various compounds cycles between its major reservoirs—the atmosphere, oceans, and living organisms.
Carrying Capacity: The maximum number of persons or things that a vehicle or a receptacle can carry
Cellular Respiration: The series of metabolic processes by which living cells produce energy through the oxidation of organic substances.
Consumer: An organism that generally obtains food by feeding on other organisms or organic matter
Dependent Variable: A dependent variable is what you measure in the experiment and what is affected during the experiment
Ecological Niche: the status of an organism within its environment and community
ecosystem: An ecological community together with its environment, functioning as a unit
PLEAAAAAAAAASE HELP ME SIMPLIFY THESE!

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