What was most key in the transition of fish into amphibians?

A. fins only
B. both lungs and limbs
C. limbs only
D. lungs only
E. both lungs and fins


Ans: B. both lungs and limbs

Biology & Microbiology

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Which of these species is currently thought to have coexisted (at the same time and places) with H. neanderthalensis?

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Recessive traits are expressed only in the homozygous state

a. True b. False Indicate whether the statement is true or false

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What are the short retinal photoreceptors responsible for color vision called?  

A.  rods B.  cones C.  bipolar cells D.  glial cells E.  ganglion cells

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Ferns possess all of the following EXCEPT:

a. cuticles. b. embryos. c. seeds. d. roots. e. leaves.

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