What defines a geological time period known as an era?
A) Location of the continents
B) The distinct life forms that were present
C) Average global temperature
D) The eras represent equal divisions of time
B
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Species richness and the relative abundance of each species determine ____
a. the species composition of an ecosystem b. the species diversity of a community
c. the species composition of a population d. the species diversity of the biosphere e. the species diversity in a niche
The is a cartilage flap that covers the larynx to prevent food entry during swallowing.
A. epiglottis B. glottis C. vocal cords D. pharynx E. esophagus
In the years after the completion of the human genome project, genome sequencing revealed surprisingly little amount
of variation in the sequence and arrangement of nucleotides in humans. a. True b. False
The breakdown of molecules into smaller components can be classified as: