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?
A) Homo erectus B) Homo ergaster C) Homo habilis D) Homo sapiens
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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
Biology & Microbiology
What are the short retinal photoreceptors responsible for color vision called?
A. rods B. cones C. bipolar cells D. glial cells E. ganglion cells
Biology & Microbiology
Ferns possess all of the following EXCEPT:
a. cuticles. b. embryos. c. seeds. d. roots. e. leaves.
Biology & Microbiology