________ is the mechanism by which organisms measure seasonal changes in relative day and night length.
Fill in the blank(s) with the appropriate word(s).
Photoperiodism
Photoperiodism is the mechanism by which organisms measure seasonal changes in relative day and night length.
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Areas that receive heavy rainfall tend to have ____ soils, and arid regions tend to have ____ soils
a. acidic; alkaline b. pH-neutral; acidic c. alkaline; acid d. acidic; pH-neutral e. pH-neutral; alkaline
A thermometer measures
a. the degree of hot or cold. b. temperature. c. a and b. d. none of the above.
When the microfibrils in the cell wall are oriented in the same direction, the cell will expand in a
direction parallel to the microfibrils. ____________________ Indicate whether the statement is true or false.
A molecule composed of carbon and hydrogen is a compound
Indicate whether the statement is true or false