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Calcium carbonate remains of the protozoans _____ and ______ are incorporated into impressive deposits of limestone.
Which of the following is true regarding Trichomonas vaginalis?
It is a parasite, It attaches to the epithelial linning of the reproductive tract, It is a flagellated parabasalid, Untreated infections damage the urinary and reproductive tracts
When under attack, ciliates can eject sticky, harpoon-like threads from structures called
Genetic variation in the ciliate Paramecium is the result of
haploid micronuclei are exchanged during conjugation
The majority of ciliates, sporozoans, and flagellated protozoans are characterized as
heterotrophic & unicellular (both C and D)
The abundant stramenophiles that are most efficient at fixing carbon dioxide, and play a major role in global cycling of carbon are
Sources of a thickening, emulsifying agent found in ice cream, salad dressing, beer, toothpaste, cough syrup, and floor polish are the
Green algae and advanced land plants are similar in all EXCEPT which of the following characteristics?
Haploid dominant life cycles
Cellular slime molds can be distinguished from plasmodial slim molds on the basis of
nuclei per cell in the aggregated form
Four of the five organisms listed below are protists that form pseudopods. Select the exception.
The principal difference between a saprophytic and parasitic mode of nutrition is
determined by the source of the nutrients
Which of the following statements describes the value of fungi in the environment?
Fungi release elements from organic matter
The flagellate spores found in chytrids and microspordians indicate that
their fungal ancestors lived in aquatic environments
The development of a protective layer of _____ allowed organisms to survive above the surface of the water
Which of the following is true of phloem?
Connects leaves to roots & Transports plant-manufactured organic products ( Both B and D)
Which of the following weather conditions would you expect to have the greatest POSITIVE impact on sexual reproduction of ferns and mosses?
Continuing wet and rainy conditions
Increasingly complex land plants developed as the _____, more resistant to cooler, drier, to unfavorable conditions, became dominant.
The initial, rapid expansion of angiosperms late in the Mesozoic is related to their coevolution with
Angiosperms are more advanced than gymnosperms because gymnosperms lack which structure found in angiosperms?
Which of the following is a body cavity that contains a lining that encloses organs, protecting and holding them in place?
The currents of water (containing food) that pass through a sponge are created by
Collar cells, resembling choanoflagellates
Chronic clogging of the lymphatic system by ___ results in a condition called elephantiasis.
Worms with a well-developed, closed circulatory system (including five pairs of hearts) are:
Which annelid structure resembles the ancestral structure from which the vertebrate kidney evolved?
___ are the most numerous animals in aquatic habitats; eaten by other invertebrates, fishes, and whales.
A flattened terrestrial arthropod predator with venom and usually one pair of lets per segment is a
Which of the following sequences correctly represents vertebrate evolution?
Which of the following is NOT one of the trends of vertebrate evolution?
Nerve cord expanded into brain
Internal bony jaws of vertebrates are believed to have been produced through the evolutionary modification of
Anterior gill support bars
The amniotic egg, also called the land egg, refers to the presence of
A membrane surrounding the embryo
What membrane structure provides nourishment for developing mammalian embryos until the placenta forms?
Marsupials fill niches in Australia that are filled by placental mammals in other parts of the world because
They were introduced to Australia by accident and do not have any native competitors or predators
Which of the following statements concerning the placenta is incorrect?
It is entirely a maternal structure
The position of the foramen magnum at the base of the skull enables researchers to determine if a primate
The location of the eyes on the front of the head in later primates ins especially important in
About 40,000 years ago, what kind of evolution replaced biological evolution in the shaping of modern humans?
A situation in which the birth rate plus immigration equals the death rate plus emigration is called
zero population growth
Which of the following results if reproduction occurs early in the life cycle?
Population growth rate increases
The number of individuals in a population that can be sustained indefinitely in an environment is known as
A J-shaped growth curve is converted to an S-shaped one
when the limits imposed by carry capacity is reached
Four of the five factors listed below are density-independent factors. Select the exception
Four of the five organisms listed below follow a type II survivorship curve. Select the exception
The human population is currently following a J-shaped curve. This means that the population is growing
If a population is growing at a rate of 5.0%, then the approximate doubling time (as calculated by the rule of 70) is
If the population's doubling time is 40 years, then the annual growth rate (as calculated by the rule of 70) is
Most of the people in the world today live
in developing countries and near the coast (Both B and C)
The total fertility rate (TFR)
is the average number of children born to a woman in a population, has dropped substantially since 1950, of 2.1 is considered replacement level
Which of the following countries has established the most extensive and rigidly enforced family-planning program
As the baby boomers generation enters retirement (Beginning in 2010)
the US government will have to provide increased subsidized medical care and other social programs, the cohort will require social services for a longer period of time than any other cohort so far, the cash contributions made by baby boomers to Social Security will be less than their requirements, there will be fewer workers contributing to Social Security to support the Boomers
____ can be said to be near the boundary between nonliving and living, while _____are just inside it
Food contaminated with _______ sickens as many as 80 million people annually in the United States
Campylobacter, Salmonella, Staphylococcus, Listera
Bovine spongiform encephalopathy and human variant (vCJD, variant Creutzfeldt-Jakob disease) are likely caused by
The organisms that represent the different species within an ecosystem that interact in various ways comprise the
In a oak forest of the American northeast, one example of the habitat component of the ecosystem would be
sunlight that filters through the tree canopy
The interaction in which one species benefits and the second species is neither harmed nor benefited is
The interactive between two species in which one species benefits and the other species is harmed is
What type of competition has occurred when one organism uses physical or behavioral interactions to limit the access of other individuals to resources?
Gauses's experiments with Paramecium growing in test tubes demonstrated that
organisms with very similar feeding habits may compete to the point of extinction
Insects such as monarch butterfly larvae are brightly colored so that they will
The ability of some animals to eat plants that contain toxic compounds may be an example of
Which of the following is NOT true of parasites?
They inflect serious injury and quickly kill their hosts
Which of the following represents the earliest stage in primary succession?
Moss and lichens on bare rock
controlled fires are started in national forests
to promote the development of climax communities, such as sequoia trees
Which of the following conditions demonstrates the area effect model of island biodiversity patterns?
Larger islands have more diversity than smaller islands the same distance from the source area
Which of the following are heterotrophs
primary carnivores, herbivores, carnivores, detritivores, decomposers
A network of actions that involve the cycling of materials and the flow of energy between community and environment is which of the following?
In a natural community, which of the following are found on ALL consumer trophic levels?
The amount of energy moved through a detrital food web is ____ that of a grazing web.
About twice as much as
Nutrients and energy move differently through the ecosystem in that _____.
Nutrients can be recycled, but energy moves in one direction through the ecosystem.
The pyramid of energy illustrates
the diminishing of usable energy as it is transferred through an ecosystem
Ecosystems obtain essential raw materials from
the components of water molecules, mineral ions dissolved in water, the weathering of rocks, the atmosphere
An excess of which of the following elements in aquatic systems likely accounts for massive algal blooms?
Nitrogen fixation is a process that
converts nitrogen gas into ammonia, which photosynthetic organisms can use
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