Term
Which of the following is probably the main factor responsible for the phenomenon of density-dependent inhibition? |
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Definition
A shortage of growth factors. |
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Term
Linked genes are an exception to |
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Definition
Mendel's law of independent assortment. |
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The following statement is false. (sorry the question was which one of the following was false, and I wasn't going to type all of the choices) |
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Definition
FalseThe following statement is fasle. (sorry the question said which of the following is false and I wasn't going to type up all of the answers) The zygote fungi include most plant parasites such as smuts and rusts. |
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Definition
A mating between an individual of unknown genotype and an individual homozygous recessive for the trait of interest. |
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Most differentiated cells retain... |
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Definition
A complete set of their genes and retain the ability to express those genes under certain circumstances. |
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Term
How many chromosomes are there in a maize egg cell nucleus as compared to a maize pollen cell nucleus? |
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Definition
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Term
Which one of the following statements about mosquitoes living in London is false? |
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Definition
The subterranean mosquitoes prefer to feed upon bats |
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Term
What kind of virus is HIV (the AIDS virus)? |
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Definition
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Term
The electron transport chains of the light reactions |
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Definition
shuttle electrons along in a series of redox reactions |
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Term
What enzyme catalyzes the unwinding of a DNA double helix? |
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Definition
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Term
Which of the following plants has a dominant sporophyte generation and a seed but no fruit? |
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Definition
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Term
The genes for the enzymes of glycolysis |
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Definition
are active in all metabolizing cells but the genes for specialized proteins are expresses only in particular cell types |
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Term
The phenotypic ratio resulting from dihybrid cross showing independent assortment is expected to be... |
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Definition
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Term
Which of these is not a component of meiosis? |
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Definition
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Term
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Definition
a fuel for cellular respiration and a starting material for making other organic molecules |
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Term
Mutations in the p53 gene can lead to cancer by |
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Definition
turning off a gene for a protein that inhibits cell division |
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Term
Conjugation between a bacterium that lacks an F factor (F-) and a bacterium that has an F factor on its chromosomes (F+) would typically produce... |
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Definition
The F- bacterium ends up with a recombinant chromosome that carries some genes from the F+ bacterium, and the F+ bacterium ends up with an unaltered chromosome |
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Term
The United Nations and other groups are responding to the widespread loss of biodiversity by |
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Definition
promoting management practices that are sustainable |
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Term
The transfer of genetic information from DNA to RNA is called |
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Definition
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Term
One of the experiments performed by Charles and Francis Darwin was to cut off the tips of grass seedlings before exposing the seedlings to light from one side. Such decapitated seedlings did not bend. A valid conclusion from this experiment is that... |
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Definition
light is perceived by the tip of the grass plants |
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Term
The following statement is false. |
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Definition
The blending hypothesis suggests that all of the traits of the offspring come from either the mother or father |
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Term
Which of the following terms refers to the situation where a single phenotypic characteristic is determined by the additive effects of two or more genes? |
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Definition
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Term
A rabbit population consists of animals that are either very dark on top or very light on top. When examining them closely, biologists were surprised to find no rabbit with a medium darkness, intermediate to the two extremes. This is an example of... |
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Definition
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Term
The following statement is false. |
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Definition
Adult but not embryonic stem cells can be grown in laboratory culture |
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Term
The disease phenylketonuria (PKU) is caused by recessive allele, and one child in 10,000 is born with disease. Let q represent the frequency of the PKU allele. What is the value of q 2? (fetuses with PKU are no likelier than other fetuses to die before birth) |
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Definition
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Term
Which one of the following is most analogous to the evolutionary history of most animal groups? |
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Definition
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Term
The following statement is false. |
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Definition
Prokaryotic chromosomes are most complex than those of eukaryotes |
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Term
An individual who does not finish all of prescribed antibiotic is.. |
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Definition
adversely affecting the health of all individuals who, in the future, may be exposed to that bacterial strain |
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Term
Collectively, jawless fish are... |
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Definition
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Term
As a result of the cascade of electrons down the electron transport chains of the light reactions, |
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Definition
NADP+ is reduced to NADPH |
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Term
Eukaryotic cells spend most of their cell cycle in which phase? |
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Definition
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Term
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Definition
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Term
Which of these colors contributes the least energy to photosynthesis? |
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Definition
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Term
The following statement is false. |
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Definition
Meiosis provides for asexual reproduction |
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Term
A concentration gradient is a form of? |
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Definition
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Term
Something stupid about elks that us very long (question 37) |
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Definition
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Term
The lac operon in E. coli.... |
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Definition
prevents lactose-utilizing enzymes from being expressed when lactose is absent from the environment. |
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Term
The following statement is false. |
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Definition
Most human genetic diseases are treatable if caught early. |
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Term
A plant's first line of defense against infection is |
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Definition
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Term
The likelihood of allopatric speciation increases when a population is __________ and ____________ the broader range of the species. |
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Definition
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Term
When animal cells are grown in a petri dish, they typically stop dividing once they have formed a single, unbroken layer on the bottom of the dish. This arrest of division is an example of |
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Definition
density-dependent inhibition |
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Term
In most green plants, chloroplasts are |
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Definition
concentrated in a zone of leaf tissue called the mesophyll |
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Term
Why does a DNA strand grow only in the 5' to 3' direction? |
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Definition
because DNA polymerase can only add nucleotides to the 3' end of the growing molecule |
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Term
Threadlike fungal filaments are called |
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Definition
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Term
Whch one of the following is a normal process of photosynthesis that would be unable to occur if all reaction centers were inactivated by toxin |
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Definition
donation of excited electron by chlorophyll a to a primary electron acceptor |
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Term
The dikaryotic phase of a fungal life cycle is |
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Definition
a stage in which hyphae contain two, genetically different, haploid nuclei |
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Term
Plants dependent on nocturnal pollinators typically have flowers that |
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Definition
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Term
Which one of the following statements is false |
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Definition
The part of the stem were a leaf attaches is called the internode |
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Term
Two chromosomes in a nucleus that carry loci for the same traits in the same positions on the chromosome but specify different versions if sine traits constitute a pair of |
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Definition
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Term
A change in the relative frequencies of alleles in the gene pool of a population is called |
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Definition
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Term
Which one of the following statements is false |
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Definition
An entire pea pod represents an aggregate fruit |
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Term
Which one of the following is an example of a hybrid that is both vigorous and sterile |
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Definition
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Term
Most polyploid species arise from |
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Definition
the hybridization of two parent species |
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Term
The digestive tract of a nematode is most like which of the following |
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Definition
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Term
varieties of plants in which self-fertilization produces offspring that are identical to the parents are referred to as |
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Definition
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Term
Which one of the the following best expresses the concept of natural selection? |
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Definition
differential reproductive success |
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Term
Which characteristic is shared by algae and seed plants? |
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Definition
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Term
The 18th century French naturalist Lamarck argues for which of the following ideas |
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Definition
species evolve, and the characteristics an individual develops as a result of using or not |
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Term
Wholesale commercial production of many horticultural crops make use of cloning techniques. |
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Definition
Plans produced by cloning grow more uniformly |
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Term
A small oak seedling... blah blah blah |
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Definition
a significant loss in the amount of nitrogen and phosphorus in the soil |
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Term
Cancer of the colon i caused by |
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Definition
several somatic cell mutations |
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Term
punctuated equilibrium differs from gradualism model because in punctuated equilibrium |
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Definition
All of the choices are right! yayz! |
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Term
Which of the following is the factor that initiated flowering in long-day plants? |
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Definition
nights shorter that a critical day |
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Term
Which of the following is not a characteristic of modern birds? |
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Definition
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Term
What is the expected phenotypic ratio of the following cross: *inset thingy* |
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Definition
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Term
During which phase of mitosis do the chromosomes line up on a plane located equidistant from the two spindle poles? |
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Definition
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Term
Which of the following is found in plant and animal cells? |
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Definition
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Term
In the chloroplast, sugars are made in compartment that is filled with a thick fluid called the |
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Definition
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Term
Consider the following sentence: "The dog did not eat" reading frame mutation |
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Definition
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Term
Which of the following types of reproductive barriers separates a pair of moth species that could interbreed except that the females' mating pheromones are not attractive to the males of other species. |
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Definition
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Term
HIV delivers its greatest damage to |
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Definition
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Term
mendels law of independent assortment states that |
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Definition
each pair of alleles segregates independently of the other pairs of alleles during gamete formation |
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Term
whic one of the following is false? |
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Definition
dna packing tends to promote gene expresion |
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Term
you are asked to culture an unidentified sample of animal tissue... |
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Definition
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Term
During the 1950's a scientist named lysenko... |
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Definition
he assumed that exposure could induce a plant to develop additional cold tolerance and that this tolerance would be passed to the plant's offspring |
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Term
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Definition
is an above ground fruiting body connected to a mycelium |
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Term
Why are (most) plants green? |
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Definition
Chlorophyll a reflects green light |
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Term
Which one of the following is not a characteristic of cnidarians? |
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Definition
Cnidarians have three true tissue layers |
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Term
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Definition
a random change in an organism's DNA |
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Term
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Definition
a random change in an organism's DNA |
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Term
Proteins that bind to DNA and turn on operons by making it easier for RNA polymerase to bind to a promoter are called |
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Definition
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Term
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Definition
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Term
cancer is not usually inherited because |
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Definition
the chromosomal changes in cancer are usually confined to somatic cells |
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Term
What term is used to refer to structures that have a similar origin or ancestry even though they may b very different in appearance? |
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Definition
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Term
Where do transcription and translation occur in prokaryotic cells |
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Definition
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Term
Which one of the following is not a function of mitosis? mitosis helps organisms |
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Definition
all of the choices are correct! |
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Term
Which one of the following is false |
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Definition
most fungi are autotrophs |
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Term
Which of the following are polyploid plants |
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Definition
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Term
What prevents a seed released in the fall from germinating immediately? |
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Definition
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Term
Which of the following human activities has contributed to an increase in the number of bacteria having R plasmids? |
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Definition
heavy use of antibiotics in medicine and in agriculture |
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Term
Why are sex-linkedconditions more common in men that in women? |
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Definition
Men need to inherit only one copy of the recessive alle for the condition to be fully expressed |
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Term
The calvin cycle constructs ___, an energy-rich molecules that a plant cell can then use to make glucose or other organic molecules |
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Definition
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Term
In a prokaryote, a group of genes with related functions, along with their associated control sequences, defines |
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Definition
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Term
Which of the following does not enhance genetic diversity |
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Definition
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Term
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Definition
have a dominant sporophyte in their life cycle |
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Term
In a photosystem, clusters of chlorophyll a, b, and carotenoid pigments function |
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Definition
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Term
Which of the following enzymes catalyzes th linking together of RNA nucleotides to form RNA? |
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Definition
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Term
Which one of the following statements about fruit fly development is false |
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Definition
the location of the head and tail ends of the egg is primarily determined by the location of sperm entry during fertilization |
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Term
Where is the cat? chromosomal deletion |
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Definition
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Term
A woody plant goes through 5 years of drought by 5 years of good growing conditions. the xylem cells formed during the 5 good years will |
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Definition
be larger in diameter that hose formed during the drought years |
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Term
many genetic disorders of humans are caused by |
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Definition
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