Tag Archive | "food chains"

Biology Help 10 Points!!! Dont Get It?


1 Answer:
Populations of rabbits usually are counted by marking with
a. paint.
b. transmitters.
c. ear tags.
d. leg bands.
2 Answer:
A prey population usually decreases as a predator population
a. increases.
b. decreases.
c. emigrates.
d. stays the same.
3 Answer:
Food chains connected together are called
a. competitors.
b. a food web.
c. populations.
d. communities.
4 Answer:
A population might be increasing because the
a. birth rate is decreasing.
b. death rate is decreasing.
c. birth rate is increasing.
d. both b and c.
5 Answer:
Which of the following is not a limiting factor?
a. nutrients
b. emigration
c. water
d. space
6 Answer:
Predator-prey relationships
a. are limiting factors.
b. affect both plants and animals.
c. affect only prey populations.
d. affect only predator populations.
7 Answer:
The second link in a food chain could be a
a. dog.
b. cow.
c. tree.
d. owl.
8 Answer:
Food is made in a community by
a. all consumers.
b. decomposers.
c. both a and b.
d. producers.
9 Answer:
The job of an organism in a community is called
a. limiting factors.
b. a habitat.
c. a niche.
d. competition.
10 Answer:
Which of the following causes an increase in population size?
a. limiting factor
b. emigration
c. immigration
d. competition
11 Answer:
Limiting factors keep populations from
a. starving.
b. emigrating.
c. increasing.
d. decreasing.

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True Or False And Multiple Choice Question Biology?


1-a change in climate may bring about the development of new species
2-plant compete for space
3-termites and the protist that live inside them depend on each other
4-parasitic relationships are harmful to a host
5-food chains hold materials together in a community
Questions I don’t understand that are multiple choice not true or false!!!
1-Albino (white haired)deer that are born in Forest surrounding will probably? a)survive better b)reproduce c)be eaten d)adapt
2-a trait that makes an individual different from others in its species is?a)a variation b)competition c)an adaptation d)selection
3-a mutation is helpful depending on whether it makes the living things? A)larger b)better adapted c)smaller d)another color
4-animals that are most fit for their surroundings usually?a)are killed b)survive c)do not reproduce d)kill other animals
5-a mutation is a change in the______ of an organism.a)color b)DNA code c)environment d)birthrate
6-one kind of evidence that life existed in the past is a? A)mutation b)fossil c)variation d)selection
7-the second link In a food chain could be?a)dog b)cow c)tree d) fox
8-an example of a community would be a?a)pond or lake b)rock c)forest d)both a and c
9-the food of a predator is its_____?a)nutrients b)habitat c)niche d)prey

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Chapter 54 Community Ecology Summer Assignment 2011, Test Your Knowledge Questions Multiple Choice.?


I was assigned this AP biology summer assignment, and i did all of the problems i could and here are some of the problems that i cannot find the answers for, and i would greatly appreciate it if someone would take their time out to help me with this. If your not 100% sure of the answer, just tell me your best guess. “note: that is if you know what your talking about and knowledgeable in this subject”
7.) Ecologists surveying the tree species in two forest plots of different ages. Plot 1 has six different species and 95% of all trees belong to just one species. Plot 2 has five different species, each of which is represented by approximately 20% of the trees. How would you describe plot 2 as compared with plot1?
a) Higher species richness
b) Greater species diversity
c) Lower relative abundance
d) Lower species richness
e) Both b and d are correct
Correct answer:
10.) invasive species often reach a large biomass because
a) They are better competitors than native species
b) They are usually producers and are not top predators.
c) They often lack natural predators or pathogens.
d) Their superior ability to disperse enables them to spread to new niche
e) They are often protected by the humans who have introduced them
Correct answer:
11.) why do most food chains consist of only three to five links?
a) There are only five trophic levels: Producers; primary, secondary, and tertiary consumers; and decomposers.
b) Most communities are controlled bottom-up by mineral nutrient supply
c) The dominant species in most communities consumes the majority of prey; thus, not enough food is left to support higher predators.
d) Acoording to the energetic hypothesis, the inefficiency of energy transfer from one trophic level to the next limits the number of links can exist.
e) According to the trophic cascade model, increasing the biomass of the top trophic levels causes a decrease in the biomass of lower levels, so that the top levels can no longer be supported
Correct answer:
16.) A major explanation for the decline in species richness along an equatorial-polar gradient is the correlation of high levels of solar radiation and water availability with biodiversity. Which of the following is also suggest as a factor in the high species richness of tropical communities?
a) The inverse relationship between biodiversity and evapotranspiration
b) The greater age of these communities (longer growing season and fewer climatic setbacks), providing more time for speciation events
c) The larger area of the tropics and corresponding richness predicted by the species-area curve
d) The lack of disturbances in tropical areas
e) The greater immigration rate and lower extinction rate found on large tropical islands
Correct answer:
18.) Which of the following best describes a zoonotic pathogen?
a) A pathogen that affects insects
b) A pathogen that requires a vector to spread from animal to animal
c) A disease-causing agent that is transmitted to humans from other animals
d) A pathogen that is found in zoos due to the unnatural habitat provided for animals
e) An ectoparasite that is transferred from animals to humans
Correct answer:
I would greatly appreciate it if someone is able to answer any of these questions.above
Also i would greatly appreciate it if someone who knows alot about this subject could tell me if I got these questions below answered right and if not what the correct answer should be.
4.) aposematic coloring is most commonly found in
a) Prey whose body morphology is cryptic
b) Predators who are able to sequester toxic plant compounds in their bodies
c) Prey species that have chemical defenses
d) Good tasting prey that evolve to look like each other
e) Plants that have toxic secondary compounds
Correct answer: E
5.) through resource partitioning
a) Two species can compete for the same prey item
b) Slight variations in niche allow closely related species to coexist in the same habitat
c) Two species can share identical niches in a habitat
d) Competitive exclusion results in the success of the superior species
e) Two species with identical niches do not share the same habitat and thus avoid competition.
Correct answer: B
8.) a palatable (good tasting) prey species may defend against predation by
a) Mullerian mimicry
b) Batesian mimicry
c) Secondary compounds
d) Aposematic coloration
e) Either a or b
Correct answer: D
9.) when one species was removed from a tidepool, the species richness became significantly reduced. The removed species was probably
a) A strong competitor
b) A potent parasite
c) A resource partitioner
d) A keystone species
e) The species with the highest abundance rate
Correct answer: E
Thank you all who take your time out to help me i greatly appreciate it

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Multiple Choice… 10 Points?


Which of the following information could be included in the description of a grasshopper’s niche, but not in a description of its habitat
a)continent where it lives
b)biome
c)biotic factor
d)carbon source
How long are food chains?
a)four steps long
b)three steps long
c)varies with day length
d)varies with ecosystem
which location would most likely hold autotrophs that derive their energy from chemical compounds?
a)swamp sediments
b)antartic pools
c)grassland soil surface
d)desert rocks
Thanks!!!!

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Sending This To Myself To Print At School. Correct Any If They’re Wrong.?


Thermal Energy: Random kinetic energy possessed by objects in a material at finite temperature.
Photosynthesis: The process by which plants and other photoautotroph generate carbohydrates and oxygen from carbon dioxide, water, and light energy in chloroplasts
Producer: A producer is anything that can make its own food, like plants. Producers are usually the start of the food chain.
Cellular Respiration: The series of metabolic processes by which living cells produce energy through the oxidation of organic substances.
Consumer: animals or plants that cannot make their own food. They must eat or consume plants and animals for food
Ecological Niche: a term describing the relational position of a species or population in its ecosystem to each other
Food Chain: A succession of organisms in an ecological community that constitutes a continuation of food energy from one organism to another as each consumes a lower member and in turn is preyed upon by a higher member.
Trophic Level: A group of organisms that occupy the same position in a food chain.
Food Web: A complex of interrelated food chains in an ecological community
Ecological pyramid: A pyramid-shaped diagram representing quantitatively the numbers of organisms, energy relationships, and biomass of an ecosystem; numbers are high for the lowest trophic levels (plants) and low for the highest trophic level (carnivores).
Biomass: The total mass of living matter within a given unit of environmental area
Biogeochemical Cycle: The chemical interactions that exist between the atmosphere, hydrosphere, lithosphere, and biosphere.
Water Cycle: The cycle of evaporation and condensation that controls the distribution of the earth’s water as it evaporates from bodies of water, condenses, precipitates, and returns to those bodies of water. Also called hydrologic cycle.
Carbon Cycle: 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.
Nitrogen Cycle: A chain of thermonuclear reactions in which nitrogen isotopes are formed in intermediate stages and carbon acts essentially as a catalyst to convert four hydrogen atoms into one helium atom with the emission of two positrons. The entire sequence is thought to generate significant amounts of energy in the sun and certain other stars
Limiting Factors: The success of an organism is limited by the presence or absence of the factors necessary for survival. Often growth of a population is limited by an apparently minor factor in the environment, such as the presence of trace elements in the soil.
Tolerance Range: each ecosystems population’s ability to adjust to variations in its physical and chemical environment
Carrying Capacity: The maximum number of individuals that a given environment can support without detrimental effects
Biome: A major regional or global biotic community, such as a grassland or desert, characterized chiefly by the dominant forms of plant life and the prevailing climate.
Succession: The act or process of following in order or sequence.
Biodiversity: The variability among living organisms on the earth, including the variability within and between species and within and between ecosystems.
Invasive Species: Any species that has been introduced to an environment where it is not native, and that has since become a nuisance through rapid spread and increase in numbers, often to the detriment of native species.
Pollution: The act or process of polluting or the state of being polluted, especially the contamination of soil, water, or the atmosphere by the discharge of harmful substances
Monoculture: A single, homogeneous culture without diversity or dissension.
Pest: An injurious plant or animal, especially one harmful to humans.
Leaching: To remove soluble or other constituents from by the action of a percolating liquid.
Pesticide: A chemical used to kill pests, especially insects

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Sending This To Myself To Print At School. Correct Any If They’re Wrong.?


Thermal Energy: Random kinetic energy possessed by objects in a material at finite temperature.
Photosynthesis: The process by which plants and other photoautotroph generate carbohydrates and oxygen from carbon dioxide, water, and light energy in chloroplasts
Producer: A producer is anything that can make its own food, like plants. Producers are usually the start of the food chain.
Cellular Respiration: The series of metabolic processes by which living cells produce energy through the oxidation of organic substances.
Consumer: animals or plants that cannot make their own food. They must eat or consume plants and animals for food
Ecological Niche: a term describing the relational position of a species or population in its ecosystem to each other
Food Chain: A succession of organisms in an ecological community that constitutes a continuation of food energy from one organism to another as each consumes a lower member and in turn is preyed upon by a higher member.
Trophic Level: A group of organisms that occupy the same position in a food chain.
Food Web: A complex of interrelated food chains in an ecological community
Ecological pyramid: A pyramid-shaped diagram representing quantitatively the numbers of organisms, energy relationships, and biomass of an ecosystem; numbers are high for the lowest trophic levels (plants) and low for the highest trophic level (carnivores).
Biomass: The total mass of living matter within a given unit of environmental area
Biogeochemical Cycle: The chemical interactions that exist between the atmosphere, hydrosphere, lithosphere, and biosphere.
Water Cycle: The cycle of evaporation and condensation that controls the distribution of the earth’s water as it evaporates from bodies of water, condenses, precipitates, and returns to those bodies of water. Also called hydrologic cycle.
Carbon Cycle: 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.
Nitrogen Cycle: A chain of thermonuclear reactions in which nitrogen isotopes are formed in intermediate stages and carbon acts essentially as a catalyst to convert four hydrogen atoms into one helium atom with the emission of two positrons. The entire sequence is thought to generate significant amounts of energy in the sun and certain other stars
Limiting Factors: The success of an organism is limited by the presence or absence of the factors necessary for survival. Often growth of a population is limited by an apparently minor factor in the environment, such as the presence of trace elements in the soil.
Tolerance Range: each ecosystems population’s ability to adjust to variations in its physical and chemical environment
Carrying Capacity: The maximum number of individuals that a given environment can support without detrimental effects
Biome: A major regional or global biotic community, such as a grassland or desert, characterized chiefly by the dominant forms of plant life and the prevailing climate.
Succession: The act or process of following in order or sequence.
Biodiversity: The variability among living organisms on the earth, including the variability within and between species and within and between ecosystems.
Invasive Species: Any species that has been introduced to an environment where it is not native, and that has since become a nuisance through rapid spread and increase in numbers, often to the detriment of native species.
Pollution: The act or process of polluting or the state of being polluted, especially the contamination of soil, water, or the atmosphere by the discharge of harmful substances
Monoculture: A single, homogeneous culture without diversity or dissension.
Pest: An injurious plant or animal, especially one harmful to humans.
Leaching: To remove soluble or other constituents from by the action of a percolating liquid.
Pesticide: A chemical used to kill pests, especially insects

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