The tiny, photosynthetic, primary producers of open water such as desmids, diatoms, and filamentous algae are referred to as ________
Fill in the blank(s) with correct word
phytoplankton
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Seasonal variation in solar radiation, temperature, and day length is due to the
A) tilt of the Earth's axis. B) greenhouse effect. C) Coriolis effect caused by the spinning of Earth on its axis. D) sunspot activities at the surface of the Sun.
Which situation is an example of behavioral isolation?
A) A species of daisy only blooms when nights become longer than nine hours. B) The offspring of horses and donkeys are sterile. C) The pollen of roses isn't recognized by the eggs of morning glories. D) Female spiders only mate when a male of the same species taps her web in a particular way.
The impact of a keystone species is proportionate to their abundance in an ecosystem
____________________ Indicate whether the statement is true or false.
This microscope produces an image of a light cell against a dark background; internal structures are NOT visible
A) compound light microscope B) phase-contrast microscope C) darkfield microscope D) fluorescence microscope E) electron microscope