What is the estimated background rate of extinction, as calculated by scientists?
A) 10% per year
B) 1% per year
C) 0.1% per year
D) 0.0001% per year
D
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An ambulance is rushing a man to the emergency room with a knife wound. The man was stabbed in the upper-right side of his abdomen and has a large amount of internal bleeding. What vital organ has most likely been damaged by the knife wound?
A. heart B. liver C. pancreas D. gall bladder E. appendix F. stomach Clarify Question · What is the key concept addressed by the question? · What type of thinking is required? Gather Content · What do you know about which organ is in the upper right side of the abdomen and has a lot of blood flow? 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?
__________ stop fluid from leaking across an
epithelium. Fill in the blank(s) with the appropriate word(s).
Are the statements below true or false? Explain your answer
A. Statement 1: Generally, in a given organism, the S, G2, and M phases of the cell cycle take a defined and stereotyped amount of time in most cells. B. Statement 2: Therefore, the cell-cycle control system operates primarily by a timing mechanism, in which the entry into one phase starts a timer set for sufficient time to complete the required tasks. After a given amount of time has elapsed, a molecular "alarm" triggers movement to the next phase.
Which one of the following cellular compartments does not have a double membrane structure separating it from the rest of the cell? Select all correct choices
A. chloroplasts B. lysosomes C. the nucleus D. mitochondria