The ______ includes all the ocean’s open water.
a. aphotic zone
b. photic zone
c. benthic zone
d. pelagic zone
d. pelagic zone
The pelagic zone includes all the ocean’s open water.
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In the context of cell communication, to what does the term ligand refer?
A. a signaling molecule B. the extracellular domain of a receptor protein C. the proteins activated as part of a signal transduction pathway D. a type of gated channel
Tropical forests are known for
A. their high diversity relative to other forests. B. their abundance of large mammals relative to other forests. C. high temperatures relative to other forests. D. their high diversity relative to other forests and high temperatures relative to other forests. E. their high diversity relative to other forests, their abundance of large mammals relative to other forests, and high temperatures relative to other forests.
Which of the following is NOT accurate regarding the Bicoid protein?
A. it is a morphogen B. it is a transcription factor C. it activates genes when it reaches a concentration threshold D. if affects the posterior part of the Drosophila embryo E. it activates gap genes
What was one of the primary results from the Hubbard Brook Watershed Project?
a. Deforestation increases flooding. b. New plant species that absorb less water were discovered. c. Pollution gravely affected the water supply. d. Primary consumers are the most important part of the energy pyramid. e. Trees absorb too much water and are not useful in a watershed area.