Ichthyosaurs were extinct aquatic reptiles distantly related to living lizards. Fossils show us that they had dorsal fins and tails, as do fish, even though their closest relatives were terrestrial reptiles that had neither dorsal fins nor aquatic tails. The dorsal fins and tails of ichthyosaurs and fish are
A. homologous.
B. adaptations to a common environment.
C. examples of convergent evolution.
D. Three of the responses above are correct.
E. Two of the responses above are correct.
E. Two of the responses above are correct.
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Justify why clinical medicine has an interest in understanding bacterial cell division at the molecular level
What will be an ideal response?
Polymerase chain reaction (PCR) has advanced an understanding of systematics because it allows
a. for analysis of morphological traits. b. for analysis of small amounts of DNA from dried museum specimens and some fossils. c. for the reconstruction of entire individuals from a small amount of DNA. d. for the reconstruction of entire individuals from a small amount of RNA. e. for the analysis of an entire genome from a small fragment of the genome.
Water is always released as a product in hydrolysis reactions
__________________Indicate whether the statement is true or false.
MRI is a type of imaging technique that can detect tumor consistency
Indicate whether the statement is true or false