Biology 2 Final - Quiz 10
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