Which plants are among those that contributed to the formation of coal?
a. horsetails
b. peat mosses
c. conifers
d. angiosperm trees
e. gymnosperm tre
ANSWER: a
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Fill in the blank(s) with correct word
When a molecule absorbs a photon, one of its electrons is raised to the ________ state
A) energetic B) quantum C) positive D) excited
In order for hormones like auxin to be used as a chemical signal within a plant it must travel through the xylem to reach the site of activity.
Answer the following statement true (T) or false (F)
Tundie is an accomplished lab technician. She wants to determine whether her boyfriend is still smoking marijuana, a habit he swore he would give up
She can't test his blood for THC because performing this test might arouse the suspicions of the authorities. Which of the following blood findings might suggest that her boyfriend is still smoking weed? A) substantial nicotine in the blood B) increased blood carbon monoxide C) low blood oxygen D) high blood niacin