A spherical shaped bacteria is called:
a. coccus.
b. auxospore.
c. bacillus.
d. bacteria phage.
e. spirillus.
A
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A scientist is trying to coax stem cells to differentiate into muscle to use as a therapy for muscular dystrophy. He looks at his Petri dish and is excited to see the cells contracting! The cells appear striated and multinucleate. What type of muscle are they?
A. cardiac muscle B. smooth muscle C. involuntary muscle D. skeletal muscle Clarify Question What is the key concept addressed by the question? What type of thinking is required?8 Gather Content What do you already know about muscle tissue? 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 heart murmur is caused by
A. a greater-than-normal force of contraction of the right atrium. B. a constriction of the pulmonary artery. C. blockage of the aorta. D. the heart valves not functioning properly. E. a greater-than-normal force of contraction of the left atrium.
You add a large amount of XFF to cultured alien liver cells. Which of the following would confirm that XFF is the alien equivalent of human epinephrine?
A) increased cell division B) decreased cell division C) glycogen breakdown D) increased glucose uptake E) insensitivity to insulin
Relative dating uses ___________ to estimate how old a fossil is.
A. Embryonic structures B. Radioactive structures C. A molecular clock D. Structural features E. Depth within rock layers