Biology 2 Final - Quiz 10

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T/F: A type of genetic flow called the founder effect occurs when a small number of individuals from a large population form a new colony.

False

One critical requirement for life to arise on Earth was time for which of the following to occur?

Molecules to accumulate and react with one another

Why are seeds reproductively superior to spores?

Seeds contain a young plant and also are protected by a seed coat.

T/F: Dolphins share synapomorphies with mammals.

True

Humans, as well as all other mammals, have hair. Hair, then, would be considered to be a(n):

ancestral character

Which of the following statements about arthropods is FALSE?

arthropods have an incomplete digestive tract

Sea snakes, which are reptiles, are similar in body form to eels, which are fish. Sea snakes and eels therefore demonstrate:

convergent evolution

What type of conversion occurs when a bacterium carrying viral genes takes on new, atypical characteristics?

lysogenic

Linnaeus' classification of plants and other organisms into separate species based on their visible structural differences, such as feathers or number of flower parts, is known as ______________.

morphological species concept

Which part of a flowering plant is the immature male gametophyte?

pollen grain

T/F: Alloploidy provides a mechanism for slow speciation.

False

Which label designates a female reproductive structure in the accompanying figure?

8

T/F: In algae, gametangia are generally unicellular.

False

Which region displays an example of the founder effect amongst its population?

Iceland

Why is it believed that RNA was the first informational molecule to evolve?

RNA molecules are able to function as both enzymes and substrates for their own replication

Many new species of desert lizards have arisen from a nonnative population which was introduced into the American southwest. This example best describes:

adaptive radiation

The most common mode of reproduction in bacteria is:

binary fission

In cnidarians, nematocysts are housed within why type of specialized cell?

cnidocytes

Which were the first organisms to release oxygen by photosynthesis?

cyanobacteria

Pyramids of numbers are of limited usefulness because they:

do not indicate the biomass of the organisms at a given time

A biological community and its abiotic environment together comprise which of the following?

ecosystem

The epidermis of a nematode is derived from the:

ectoderm

Small hairlike structures made up of protein on the surface of bacteria are called:

fimbriae

A porpoise and a dolphin, both mammals, mate and produce an embryo, but the embryo fails to complete development. This event describes:

hybrid inviability

Which postzygotic barrier do mules illustrate?

hybrid sterility

Niches apply to:

individual species

The phylum name Arthropoda refers to:

jointed appendages

One reason that the realized niche and fundamental niche are not typically the same is:

limiting resources

A plant with floral parts in threes or multiples of three would be classified as a:

monocot

Most conifers have separate male and female reproductive parts on the same tree. This condition is referred to as:

monoecious

What are the small circles of DNA that exist within the bacterial cytoplasm in addition to the bacterial chromosome?

plasmids

Which pair best represents photosynthetic organisms?

primary producer and autotroph

Presently, it is thought that organic polymers may have formed and accumulated on:

rocks and clay

What is the third tropic level of a food chain?

secondary consumers

If adult sponges are sessile, why can they still be classified as animals?

sponge larvae are motile

What characterizes hybrid breakdown?

the sterility of the progeny of hybrid individuals

Which characteristic defines a virus?

viruses cannot metabolize

When r = −0.00057, the population size:

will decrease

When r = 0.00001, the population size:

will increase

Which are the symbiotic dinoflagellates, which live in the bodies of marine invertebrates such as corals?

zooxanthellae


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