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When soil is plowed in the spring, pigweed seeds that have been buried in the soil all winter are churned up to the surface and redeposited just under the surface. ███ █████ ████████ ██ ███ █████ ██ ████████ ██████████ ██████████ █████ ████ ██████ ██████ █████████ ██ ████████ ██████ ███ ██████ ███ █████ ████ ██████ ██ ███ █████ ███ ███ ██████████ █████████ ███████ ████████████ ███████ ███ █████████ █████████ ████████ ██ ████████ ██ █████████ ███ █████ ██ ███ ██████████
Summary
When soil is plowed in the spring, pigweed seeds are churned up and redeposited just under the surface. Brief exposure to sunlight stimulates receptors. When receptors are stimulated, germination is triggered. Prolonged darkness, followed by exposure to sunlight, is necessary for the seeds to germinate.
Strongly Supported Conclusions
Fewer pigweed seeds will germinate when a field is plowed at night versus a field that is plowed during the day.
14.
The statements above, if true, ████ ████████ ███████ █████ ███ ██ ███ █████████ ██████████ █████ █ █████ ████ ████ ██ ██████ ██ ███ ██████ ███ ██ █████ ███████ █████ ████ ████ ██████ ██ ███ ████ ███ ███████
a
Fewer pigweed plants ████ ████ ██ ███ █████ ██ ██ ██ ██████ ████ ██ █████ ████ ██ ██ ██ ██████ ██████ ███ ████
b
Fewer pigweed plants ████ ████ ██ ███ █████ ██ ██ ██ ███ ██████ ██ ███ ████ ██ ██ ██ ██████ ████ ██ ██████
c
Fewer pigweed plants ████ ████ ██ ███ █████ ██ ██ ██ ██████ ████ ██████ ███████ ████ ██ ██ ██ ██████ ████ █████ ███████
d
The pigweed seeds ████ ███ ███████ ██ ██ ███ ███████ ██ ███ ████ ██████ ███ ███████ ████ ███ █████████ ██████ ████ ███ ███████████ █████ ███ ███████ ██ ███ █████
e
All of the ███████ █████ ████ ███ ███████ ██ ███ ███████ ██ ███ ████ ██████ ███ █████ ██ ██████ ████ ██████████