A high concentration of H+ in the thylakoid compartment provides potential energy for the ____ by ____.
A. breakdown of water; oxidation
B. production of ATP; ATP synthases
C. reduction of NADP+; an electron transfer chain
D. production of sugars; the light-independent reactions
E. production of O2; photolysis
Answer: B
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Non-disjunction is the failure of homologous chromosomes to separate during meiosis I, or the failure of sister chromatids to separate during meiosis II or mitosis. As a result, both homologous chromosomes or both sister chromatids migrate to the same pole of the cell. This produces daughter cells with an imbalance of chromosomes. If 18 pairs of sister chromatids segregate normally during meiosis II in cats (n=19) but we have non-disjunction of 1 pair, then at the end of meiosis II we will have
A. 3 cells with 20 chromosomes and 1 cell with 18. B. 2 cells with 20 chromosomes and 2 cells with 18. C. 2 cells with 19 chromosomes, 1 with 20, and 1 with 18. D. 3 cells with 18 chromosomes and 1 cell with 20. Clarify Question · What is the key concept addressed by the question? · What type of thinking is required? · What key words does the question contain and what do they mean? Gather Content · What do you know about non-disjunction? How does it relate to the question? Consider Possibilities · What other information is related to the question? Which information is most Choose Answer · Given what you now know, what information and/or problem solving approach 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?
Cytoplasmic division in animal cells involves _____
a. formation of a cell plate b. formation of a deepening cleavage furrow c. the formation of vesicle clusters d. the formation of a ring of myosin filaments under the plasma membrane at the equator e. the use of ADP
Notochords and stomochords are homologus
a. true b. false
Recent analysis indicates that the chytrids are the most primitive division of fungi and that a single event resulted in the loss of flagella in the more advanced fungi.
Answer the following statement true (T) or false (F)