Ecology - Organisms & Population Questions and Answers

Zero population growth becomes more common when the death rate approaches the birth rate. the birth rate approaches the death rate. both the birth and death rates approach each other. All of the above are correct.

Which of the following is the most commonly realistic model of growth? Capped Logistic Exponential Geometric

Singapore has a growth rate of -3.4%. What can be said about the growth rate of the population in Singapore? A. It is declining. B. It is exploding. C. It is stable. D. It is improving.

What part of the Medicare plan is a medical benefit? Part C Part D Part A Part B

Which of the following is NOT explicitly needed to calculate carrying capacity? A. biotic potential B. rainfall C. food requirements

When humans disrupt biogeochemical cycles, which type of feedback loop occurs? A. neutral B. contamination C. positive D. parallel

Organisms that are distributed evenly across the environment have a dispersal pattern. A. uniform B. clumped C. random D. cyclic

What was a negative consequence of humans being hunter-gatherers? A. they needed to stay in one location for food B. they cultivated their own food C. they had to move around to find food D. they had to have large families to help on the farm

Limiting factors reduce the speed of a population's growth. If all limiting factors were removed, populations would grow A. as slow as possible B. slowly C. as fast as possible D. at a neutral speed

Human populations tend to congregate around resources like rivers. Therefore, the human population has what type of distribution on earth? A. spread evenly B. no apparent pattern C. uniformly distributed D. clumped

Watering holes in the African savanna cause animals to congregate around this resource. This is known as a dispersal pattern. A. uniform B. clumped C. random D. cyclic

If a population has a positive growth rate, it is A. increasing in death rate B. decreasing in size C. increasing emigration D. increasing in size

What factors could limit the population of gypsy moths growing exponentially in northern Ontario during the summer months?

The conventional level in Kohlberg's theory of moral development involves which of the following: Conforms to avoid censure by authorities Individual principles of conscience Obey rules to avoid punishment Flexibility in learning

What is the difference between theoretical and actual population growth? a. theoretical: limits exist, J-shaped curve; actual: no limits, S-shaped curve b. theoretical: limits exist, S-shaped curve; actual: limits exist, J-shaped curve c. theoretical: no limits, J-shaped curve; actual: limits exist, S-shaped curve d. theoretical: no limits to growth; S-shaped curve; actual: limits exist: J-shaped curve

What does the following sentence from the conclusion section of the essay "Nationality in Love" by Aldous Huxley indicate? "Ashamed of admitting that such feelings can have a purely sublunary cause, we affirm, like the Australian poetess, that 'God Himself is in the melody." Referring to a quotation to relate to the issue Introduction of a counterclaim Introduction of a claim

Which biorne has the greatest variation in annual mean precipitation, but the least variation in annual mean temperature? Tropical forest Desert Tundra Temperate broadleaf forest Coniferous forest

Bivalves have little sensory ability and heavy shells, while other mollusks have well developed sense organs and much greater mobility. The bivalve adaptations are best suited for ...? a fast moving predator life a sedentary filter-feeding life a slow moving herbivore life a slow moving predator life

What is one of the dimensions of The Institute for Healthcare Improvement's (IHI) Triple Aim? A. Increasing the per capita cost of health care B. Improving the patient experience of care C. Improving the teamwork of health care providers D. Improving nursing informatics

Henry says that evolution is only a theory based on minimal evidence. Matteo disagrees and says that the theory of evolution has a substantial amount of evidence. Which of the following arguments could Matteo ACCURATELY make as evidence of evolution? A Genetic mutations occurring in an individual in a population that enable it to become more fit for survival in its environment is evidence of evolution. B Analogous structures, such as the wings of butterflies and the wings of birds, are evidence of recent common ancestry and evolution. C Vestigial structures, such as the leg bones in whales and snakes, are evidence of common ancestry and evolution. D All living organisms evolving at relatively the same rate over time is evidence of common ancestry and evolution.

Different species of bumblebee compete for flower nectar in their ecosystem. While the flowers vary in the length of their petals, bumblebees vary in the length of a mouth part called a proboscis. Bumblebees demonstrate a preference for flowers that correspond to the length of their proboscis. Species with proboscises of similar length tend to occupy different areas. Species that live in the same area tend to have proboscises of different lengths. Which of the following best explains the relationship between the different bumblebee species living in the same area? a. The bumblebees have undergone allopatric speciation due to geographic isolation. b. The bumblebees have undergone niche partitioning due to competition. c. The bumblebees have a mutualistic relationship with other bumblebee species due to natural selection. d. The bumblebees have a commensalistic relationship due to the variety of niches that are available.

A fish population of 250 in a pond has a maximum annual rate of increase of 0.8. If the carrying capacity of the pond is 1,500 for this species, what is the expected population size after one year? a. 167 b. 417 c. 450 d. 500

Which of the following is a description of a resource that belongs to a country with a high carrying capacity? A. Food is brought in from other places. B. Homes are small and house many people. C. Water comes directly from bodies of water. D. Food is not always available.

The American bullfrog is native to much of the eastern United States. This species has successfully begun to spread west as an invasive species. It is thriving in the western United States because of its large size, high mobility, and tremendous reproductive capabilities. American bullfrogs have very generalized eating habits and often eat the same food sources as the native frog species in the western United States, causing a reduction in the overall food supply. The relationship between the American bullfrog and native frog species in the western United States can best be characterized as A. competition B. predation C. parasitism D. mutualism

A small population of black-footed ferrets has the same positive intrinsic rate of increase (r) as a large population. If everything else is equal,which statement about these populations is true? The large population will add more individuals per unit time. The J-shaped growth curves will look identical. The growth trajectories of the two populations will proceed in opposite directions. The two populations will add equal numbers of individuals per unit time. The small population will add more individuals per unit time.

A population's per capita birth rate is 1.02 and its per capita death rate is 0.8. Assuming constant per capita birth and death rates, how long will it take for this population to double in size? Write your answer to the nearest whole number with no units.

If every individual occupies 2 units of space, how long will it take for a population of 100 individuals to use up all the space when there are 1000 units of space and the population is growing at a constant intrinsic rate of 1.5% ? Write your answer to the nearest whole number.

Select the factors that determine a population's intrinsic (optimal conditions) rate of increase. Density Life history Dispersion Carrying capacity Per capita birth rate and death rates

Which of the following is a difference between logistic and exponential growth? Both are affected by density but logistic growth is slower. Only logistic growth reflects density-dependent effects on births or deaths. Exponential growth depends on birth and death rates and logistic does not. In logistic growth, emigration and immigration are unimportant.

Would you expect a population in which most members survive for a long time to produce few or many offspring? Which would be the most advantageous to the population as a whole? Explain.

Suppose a human population exhibits a Type III survival curve. (look at your notes) What would you expect to happen to the curve over time if a dramatic improvement in medical technology takes place? Explain.

A. Differential Reproduction B. Overproduction C. Struggle to Survive D. Genetic Variation Which part of natural selection (see choices above) is described by the following sentence: Within a population, individuals have different traits.

The doubling period of a bacterial population is 15 minutes. At time t=110 minutes, the bacterial population was 80000. What was the initial population at time t = 0? Find the size of the bacterial population after 5 hours.

What factor (listed below) contributes to population growth? deaths predation emigration immigration

Prokaryotic organisms are most vulnerable to antibiotics during which phase of the bacterial growth curve. Explain why are they most vulnerable at this phase. For the toolbar, press ALT+F10 (PC) or ALT+FN+F10 (Mac).

What are the parts of the Declaration of Independence? Use the slides presentation and the information given in class. Briefly explain each part, but wait until we go over them in the class. Minimum 150 words. Remember PLATESPEOVENTS (p. 106 on)

Directions Answer each question on the lines. Use complete sentences. 9. What is pollen? ___ 10. How do animals help some plants disperse their seeds? ___ 11. Name two types of symbiosis. ___ 12. Define parasitism. ___ 13. Why are beavers a keystone species? ___ 14. Explain commensalism. ___ 15. How can the loss of one species affect many other species? ___

Did humans make stone tools that were 2.6 million years old? Scientists have not found stone tools that are that old. No, you can go to the fossil record and find that there were not humans dating back 2.6 million years. Yes, you can go to the fossil record and find that there were humans dating back 2.6 million years. No answer text provided.

Even though America declared neutrality, they still showed favor toward the Allies due to... a similarities of language, government as England. b Britain bribing America to side with the Allies. c favoring the dictatorship of Germany. d Germany bribing America to side with the Central Powers

The frequency of a disease is 30/1000. This is a disease that follows a dominant/recessive pattern of inheritance on one gene (where the only affected individuals are all homozygous recessive). What is the frequency of the disease genotype q²? 30% 13% 6% 3%

It is said that the human population of the earth is in an exponential phase of growth. Which of the following statements would be true? the earth can sustain this growth indefinitely toxic wastes are building up plenty of nutrients can be grown to sustain this growth Disease is spreading easily due to crowding two of the above are true Three of the above are true

Ari is using _____ in his speech when he shows the strength of his examples by using a ——— phrase like, "One case that supports my claim is . . ." deductive reasoning inductive reasoning causal reasoning reasoning by analogy

Choose the correct pronoun to fill in the blank. Vanessa is so conceited! She does not think her friend is as beautiful as __ is. her hers she

Which following features would you expect to see in the flowers of humming birds pollinated plants? a. very simples tiny flowers procticing massive amount of pollen b. flowers that smells and look like rotting flesh c. Red or bright flowers with a long nectar tube d. petals with UV absorbing pigments e. very large and fragrant white flowers

Why is it important? Biodiversity: Over 80% of the world's terrestrial biodiversity can be found in forests Sustainable livelihoods: Healthy forests support the livelihoods of 1.6 billion people globally, one billion of whom are among the world's poorest. Climate mitigation and adaptation: The world's forests absorb 2.4 billion tonnes of carbon dioxide (CO2) per year and release needed oxygen How is the long-term survival of a species dependent on changing resources that are becoming limited in nature?

Which natural resource became more available to the American public as a result of railroad expansion? natural gas wood coal water

A population of 250 birds inhabit the canopy of a tropical rain forest that has a carrying capacity of 400 birds. What is the maximum population growth rate if the population grows to 283 in one year? a. 0.12 b. 0.13 c. 0.35 d. 0.39

High testosterone is often associated with shorter lifespan in mammals. However, you find a new species of mouse in which males live longer than females under field conditions. Which of the possible explanations below would NOT predict this pattern? A) Males, but not females, provide territorial guarding that improves the survival of their grandchildren. B) Male-male competition often injures the participants. C) Females suffer costs of reproduction caused by the burden of milk production. D) Females enter menopause and stop reproducing at age five, while males can reproduce until death.

According to EPA guidelines, solid waste LEGALLY can be found in all of the following states of matter EXCEPT _______. A. solid B. liquid C. gas D. plasma

Mammals have lungs that have millions of alveoli that increase the surface available for gas exchange Two species utilizing the same food source is an example of interference competition Parasitism provides nutrients for the host The study of how organisms interact with one another and with their nonliving environment is ecology A population grows exponentially when the birth rate exceeds the death rate and immigration exceeds emigration During respiratory exchange, carbon dioxide moves from the blood into the alveoli due to diffusion down a concentration gradient Density-independent factors are typically abiotic. _Small body size is a typical feature of K-selected organisms An insect population grows exponentially until an early winter freeze kills almost all of the insects. The next spring, the population grows exponentially again. This type of population growth is called sustained cycling. Generally, r-selected organisms exhibit long life spans and extended parental care of offspring A population of rabbits introduced into an island grew rapidly for a few years and then the growth slowed down and stabilized. The population become stable because the carrying capacity was reached.