Cyanide poisoning prevents the production of ATP. If ATP were not available to drive the sodium-potassium pump, which of the following is most likely?
A) K+ concentrations inside the cell will increase causing hyper polarization.
B) Na+ concentration inside the cell will decrease causing depolarization.
C) Na+ will leak back into the cell and bring water with it causing cells to burst.
D) The voltage of the membrane will be unchanged.
Answer: C) Na+ will leak back into the cell and bring water with it causing cells to burst.
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Wings of birds and butterflies have similar functions, but different evolutionary origins. They are:
A. physiological structures. B. homologous structures. C. analogous structures. D. phylogenetic structures.
Why are microsporidia so hard to classify?
A. When compared to other eukaryotic organisms, microsporidia are extremely small. B. The intracellular parasitic lifestyle greatly reduces the need for functional organelles. C. They lack nuclei. D. They are very rare. Clarify Question What is the key concept addressed by the question? What type of thinking is required? Gather Content What do you already know about microsporidia? What other information is related to the question? Choose Answer Given what you now know, what information is most likely to produce the correct answer? Reflect on Process Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
A specific internal sequence of amino acids that ensures that the protein containing it will not survive long within the cell is called a(n) _______.
a) proteolicron b) denocon c) degradicon d) degron e) codon
In order for an ovule (egg cell) in a flower to be fertilized and form a viable seed, pollination must occur
In this process, a sperm cell is delivered to the ovule when the pollen grain lands on the stigma and grows a tube, which enters the ovary and discharges the sperm cell to form a diploid zygote when it fuses with the egg cell. Although it only takes one pollen grain to successfully deliver sperm to the egg, numerous pollen grains are generally transferred to the stigma during insect pollination of flowering plants. Which phenotypic traits of pollen would you predict to be selected upon to promote survival and fitness within an insect-pollinated flowering plant? A) High pollen tube growth rate and ability to detect chemicals from cells surrounding the egg. B) Ability to produce the most cells during mitotic growth of the pollen tube. C) Elaborate and striking UV "nectary guides" on the petals to guide an insect to the stigma. D) Larger pollen in order to carry the tube that is necessary for delivery of the sperm cells.