Which of the following junctions influences the passage of ions and small molecules between cells?
a. tight
b. adhering
c. gap
d. loose
e. plasma
Answer: c. gap
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Imagine two species of birds with similar beak sizes and diets. Where the two species are allopatric, we would expect that their beak sizes
A. should be more different than when sympatric. B. should be more similar than when sympatric. C. should be larger than when sympatric. D. should be smaller than when sympatric. 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 character displacement? 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?
The sharp peak of estradiol secretion during the ovarian cycle
A. inhibits the secretion of LH and FSH. B. stimulates the secretion of LH and subsequent ovulation. C. stimulates development of the uterus. D. causes meiosis I to be completed. E. stimulates development of the uterus and causes meiosis I to be completed.
You have just moved from Norfolk, Virginia (sea level), to Taos, New Mexico (high in the
mountains), and you find yourself out of breath climbing a small hill. Three months later, climbing the same hill, you have no difficulty. In the interim you have not altered your level of activity or diet. Which hormone has been at work? a. angiotensin b. erythropoietin c. aldosterone d. estrogen e. anti-diuretic hormone
If a cell normally has 20 chromosomes in its diploid stage, how many will be present in each cell at the end of meiosis 2?
a. 20 b. 10 c. 40 d. 5