Create an account
If the DNA content of a cell is X, what would be the DNA content of a cell undergoing meiosis at the end of telophase II
A particular cell has half as much DNA as some of the other cells in a mitotically active tissue. The cell in question is most likely in
How many different combinations of maternal and paternal chromosomes can be generated in gametes made by an organism with a diploid number of 8(2n=8)
A cell goes through G1, S and G2, but fails to undergo cell division and immediately goes back into G1, this would cause the cell to:
Increase DNA content
In humans, 2n=46. How many possible different cells could potentially be generated by any one indivdual
A cell undergoes a number of mitotic divisions with each cell generation becoming smaller. Which Stage of the cell cycle is missing?
During preparation for sexual reproduction, meiosis is responsible for the production of
different haploid cells
If the DNA content of a diploid cell in G1 phase of the cell cycle is X then the DNA content of the same cell at metaphase of meiosis I would be
If the DNA content of a diploid cell in G1 phase of cell cycle is X and 2X in meiosis I then in metaphase of meiosis II would be
Dna content of of cell that is X at metaphase of meiosis I would have DNA content what at end of telophase II
How do the daughter cells at the end of mitosis and cytokinesis compare with their parent cell when it was in G1 of the cell cycle?
The daughter cells have the same number of chromosomes and the same amout of DNA
A cell containing 92 chromatids at metaphase of mitosis would at its completion produce two nuclei each containing how many chromosomes?
what is the sequence in evolution of life on this planet
abiotic production of organic molecules, polymerization, protobionts
The mian explanation for the lack of a continuing abitic origin o flife on Earth today is that
our oxidizing atmosphere is not conducive to the spontaneous formation of complex molecules
One of the major evolutionary trends observed in living organisms is the
development of specialized cells
in order for living organisms to continue to develop and to become more comples, which of the follwing had to be in place first
the relative success of a group of organisms is based on
species number, total biomass, evolutionary status, energy flow
in distinction to the cell wall of gram positive bacteria, the cell wall of gram negative bacteria contain
a prokaryotic genome is different from a eukaryotic genome in that
it has less protein associated with its DNA and is not enclosed in a nuclear envelope
which structures play direct roles in permitting bacteria to adhere to each other or to other surfacs
Darwin's unique contribution ot the theory of evolution was to propose that
the environment selects successful organisms
oxygen has an atomic number of 8. You would expect the arrangement of electrons in this atom to be
two in the first orbital and six in the second
which of the following elements having the given atomic number would be the elast reactive, 1, 3, 5, 8, 10
phosphorous has an atomic number of 15 and atomic mass number of 31 how many electrons does it have in outermost orbital
phosphorous has an atomic number of 15 and an atomic mass number of 31 how many covalent bonds is it likely to form
A radioactive isotope of phosphorous has a mass number of 32. this implies that p-32 has________than p-31
one more neutron
a protein being produced and then secreted by a secretory cell wold pass through the following sequence of cell structures
rough endoplasmic reticulum---smooth endoplasmic reticulum---golgi
In regard to the evolution of the protists whcih of the following is most correct
they are polyphyletic
the transfer of the pollen grains from the male to the female reproductive structure is known as
Seed plants do not possess which of the following structures
a large, nutritionally independent gametophyte
the ___represents the sporophyte generation of a conifer and the ____produces gametophytes
fruis have contrubted to the success of angiosperms by
facilitating dispersal of seeds by wind and animals
angiosperms are the most successful terrestrial platns. this success is due to
animal pollination, reduced gametophytes, fruits enclosing seeds and xylem
the most ancient branch point in animal phylogeny is that between having
radial or bilateral symmetry
what is an important distinction between a coelomate animal and a pseudocoelomate animal...coelomates
have a gut that possess muscles separated from the body wall, whereas pseudocoelomates have no gut musculature
the cells in a sponge responsible for trapping food particles from circulating water are called
the operation of a hydrostatic skeleton is dependent upon all of the folling with exception of
porous body wall
the success of the arthropods is most likely due to their possession or development of
which of the following best descreibes the echinoderms
this group has more extinct thatn living species
two necessary pre-adaptations had to be in place before vertebrates moved onto land. These were
swim bladder and lobe fins
sclerenchyma cells would most likely be found associated with which of the following tissues
a sieve-tube member would likely lose its nucleus in which zone of growth in a root?
zone of maturation
which of the following cells provide flexible support to the growing parts of platns
stomata open when guard cells
become more turgid because of an influx of potassium followed by water entry
movement of phloem sap from a sugar source to sugar sink
may translocate sugars from the breakdown of stored starch in a root up to developing shoots
in darwin's experiment with plants, which part of the seedling was sensitive to light?
the extreme tip of the leaf sheath
which of the following are responsible for softening the cell wasll in repsonse to ausin stimulation
the increase in girth associtated with production of wood and bark in trees occurs as a consequence of
which of the following would be a good way to ripen a green tomato
placing it in a sealed plastic bag with an overripe banana
Compared with a smaller cell, a larger cell of the same shape has
less surface area per unit of volume
Water leaves the arterial end of the capillary into the interstitium because of:
excess hydrostatic pressure
) CO2 is transported from the tissues to the lungs primarily in the form of:
as bicarbonate ion in solution in the plasm
Please allow access to your computer’s microphone to use Voice Recording.
Having trouble? Click here for help.
We can’t access your microphone!
Click the icon above to update your browser permissions and try again
Reload the page to try again!Reload
Press Cmd-0 to reset your zoom
Press Ctrl-0 to reset your zoom
It looks like your browser might be zoomed in or out. Your browser needs to be zoomed to a normal size to record audio.
Please upgrade Flash or install Chrome
to use Voice Recording.
For more help, see our troubleshooting page.
Your microphone is muted
For help fixing this issue, see this FAQ.
Star this term
You can study starred terms together