Which is true?
-Sleep is the only physiological function to follow a circadian rhythm
-Ultradian rhythms are those that are longer than a day
-An individual's sleep periods generally exceed the 24 hour day
-Zeitgebers are internal factors that help entrain our sleep patterns
An individual's sleep periods generally exceed the 24 hour day
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Character states shared by the ancestor or outgroup of a clade are called
A. derived traits. B. homoplasies. C. synapomorphies. D. plesiomorphies. E. symplesiomorphies.
All animals eat other organisms in order to gain building materials for the body. this makes them ______. since they obtain necessary energy and chemical building blocks from the environment
Fill in the blank(s) with the appropriate word(s).
Watson and Crick are credited with the discovery and description of the DNA
A) phosphate group. B) covalent bonds. C) double helix. D) deoxyribose sugar. E) hydrogen bonds.
Which of the following statements is incorrect in the context of fossilization?
A. Impressions form detailed imprints of only external structures. B. Extreme pressure transforms the mineralized remains into rock. C. Sediments that slowly accumulate on top of the site exert increasing pressure. D. Minerals dissolved in the water gradually replace minerals in bones. E. Mineral particles settle out of the groundwater and crystallize inside cavities.