T or F: Muscles shorten by 50% to 70% of their resting length
What will be an ideal response?
True
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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?
Which of the following is true of telomeres?
a. They have the sequence ATAGGG. b. They are at in the middle of chromosomes. c. Their sequence can change. d. They shorten with each round of cell replication. e. They have the sequence ATAGTG.
Four of the five genes listed below occur in
Drosophila. Select the exception. a. dunce b. wingless c. witless d. tinman e. minibrain
North America is currently experiencing an unprecedented and rapid loss of species. What is believed to be the main trigger of such events, either directly or indirectly?
A) continental drift B) increased human population C) climate change D) increased predation by wild carnivores