The greatest number of endemic species is expected in environments that are _____
A) easily reached and ecologically diverse
B) isolated and show little ecological diversity
C) isolated and ecologically diverse
D) easily reached and show little ecological diversity
B
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Although Lamarck's hypothesis was wrong, it is significant. Why?
What will be an ideal response?
Chart the path of urine from the blood to the outside of the body. What will be an ideal response?
The meninges are composed of:
a. bone and dura mater only. b. dura mater and arachnoid only. c. arachnoid and pia mater only. d. dura mater, pia mater, and arachnoid only. e. bone, dura mater, pia mater, and arachnoid.
Although 61 different codons code for amino acids, cells contain fewer than 61 different tRNAs. Why?
A. Although 61 different codons code for amino acids, any given cell contains fewer than 61. B. Because the 5' base on the mRNA codon has some flexibility (wobble); thus, some mRNA codons can pair with more than one tRNA anticodon. C. Because the 5' base on the tRNA anticodon has some flexibility (wobble); thus, some tRNA anticodons can pair with more than one mRNA codon. D. Because each amino acid is coded for by just one codon.