Migration is a key evolution mechanism by which microevolution occurs
Indicate whether the statement is true or false
TRUE
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Approximately what percentage of our planet's land area is covered by crop and pasture lands?
A. 25% B. 5% C. 10% D. 50% E. 60%
Which one of the following can form scar tissue in kidneys and severely impair kidney function?
a) Cystitis b) Urethritis c) Pyelonephritis d) Ureteritis
A plant scientist was hired by a greenhouse operator to devise a way to force iris plants to bloom in the short days of winter. Iris normally blooms as long-day (short-night) plants. Which of the following has the best chance of creating iris blooms in winter?
A) Artificially increase the period of darkness in the greenhouse. B) Increase the temperature to more closely follow summer temperatures. C) Alternate four hours of darkness with four hours of light repeatedly over each 24-hour period. D) Interrupt the long winter nights with a brief period of light.
Which one of the following quantities best represents the respiratory heat lost by plants in an ecosystem?
A. Gross primary productivity - standing crop biomass B. Net primary productivity C. Gross primary productivity D. Gross primary productivity - secondary productivity E. Gross primary productivity - net primary productivity