Which of the following statements concerning an exoskeleton is false?

a. It is composed of living tissue that grows along with the animal.
b. Although the exoskeleton is rigid, it allows for flexibility.
c. It may act as an anchor to which muscles attach.
d. It is capable of providing protection against predators or pathogens.
e. Animals with exoskeletons must undergo a molting process


A

Biology & Microbiology

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Which one of the following annelid structures or events is not correctly paired with its role in locomotion?  

A.  circular muscles contract—segment becomes thin and long B.  longitudinal muscles contract—segment becomes thick and short C.  fluid in coelom—provides a hydrostatic skeleton D.  septum—allows each segment to move independently E.  chaetae—provides gas exchange surface for body muscles

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In control of the lactose operon, allolactose acts as a(n)

1.repressor. 2.activator. 3.co-repressor. 4.inducer. 5.structural gene.

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Species

What will be an ideal response?

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Which process produces multiple proteins from the same primary transcript in the same cell?

A. chromatin remodeling B. histone modification C. combinatorial control D. alternative splicing E. RNA editing

Biology & Microbiology