What is the evolutionary relationship between a human arm and a cat’s leg?
a. They are vestigial structures.
b. They are divergent structures.
c. They are homozygous structures.
d. They are homologous structures.
e. They are homoplastic structures.
d
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Unless rare antigens are present ideally, a patient needing a transfusion will receive blood of the identical blood type. But in an emergency, what blood type can be given in a transfusion to anyone?
A. AB Rh-positive B. AB Rh-negative C. O Rh-negative D. O Rh-positive E. A Rh-positive Clarify Question What is the key concept addressed by the question? What type of thinking is required? Gather Content What do you already know about blood typing? 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?
Why are living organisms such an important component of soil? What will be an ideal response?
Gene cloning is used to ________
A) make other organisms, such as Dolly, the first cloned sheep B) produce large quantities of human proteins C) cure genetic disorders D) help cure cancer
All of the following are dependent on cilia EXCEPT the
A) gills of oysters. B) respiratory tract of vertebrates. C) oviduct in mammals. D) sperm of animals.