If a parent cell divides through 8 generations, how many cells will result?
A. 8
B. 64
C. 128
D. 256
E. 100,000,000
Answer: D. 256
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Marathon runners are encouraged to stop at water stations along the course to stay hydrated. However, occasionally a runner drinks too much water and suffers from hyponatremia, or "water intoxication". While water itself is not toxic, drinking too much can upset ion balance in the extracellular space. Based on what you know about ions and nerve signaling, the levels of which important ion are most likely to be disrupted in hyponatremia?
The word hyponatremia derives from the words hypo ("under" or "less") and natrium ("sodium"). The word natrium is the basis for the abbreviation Na for sodium. Hyponatremia is a rare condition, but has become of more concern with the rise in amateur runners participating in marathons. Since they run slower, they spend longer on the course and have more opportunity to drink water and sweat out additional sodium. A. hydrogen B. potassium C. calcium D. sodium E. oxygen Clarify Question · What is the key concept addressed by the question? · What type of thinking is required? Gather Content/Choose Answer · What do you already know about components of the nervous system? What other information is related to the question? 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?
Which of the following is an aspect of asexual reproduction that is sometimes disadvantageous?
A) It allows animals that do not move around to produce offspring without finding mates. B) It allows an animal to produce many offspring quickly. C) It saves the time and energy of gamete production. D) It produces genetically uniform populations.
What is the main cause of drying and desiccation?
Old MacDonald is a rancher and operates a beef feeding lot. To improve the quality of the calfs, he bought a raging bull for the purpose of husbandry. On the spring and during the calfing season, he was surprised that some of the cows suffered of early embryonic death followed by temporary infertility. What is the causative agent of such outbreak?
A. campylobacter fetus subsp. fetus B. bacillus anthracis C. campylobacter bovis D. erysipelothrix rhusiopathiae E. campylobacter fetus subsp. veneralis