Macroevolution describes large scale patterns in the history of life
Indicate whether the statement is true or false.
T
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What naturally occurring process is responsible for keeping the earth warm enough to sustain life?
A. Oceanic currents B. Increasing biodiversity C. Greenhouse effect D. Variable microclimates E. Atmospheric circulation
Which of the following is the primary role of modern zoos in conservation efforts?
a. providing wildlife education to the public b. breeding and releasing endangered species c. raising funds and awareness for conservation preserves d. restoring keystone species to their original ecosystems
The hormone ____ is involved in a positive feedback cycle that results in strong uterine contractions during labor
a. estrogen b. oxytocin c. cortisol
d. progesterone e. prolactin
When cytokinins are sprayed on leaves of a cut stem, the leaves become, or remain, yellow. Indicate whether the statement is true or false