Which of the following are mostly vines, have broad leaves, and are found in subtropical zones?
a. Conifers
b. Ginkophytes
c. Cycads
d. Gnetophytes
d. Gnetophytes
Gnetophytes are mostly vines, have broad leaves, and are found in subtropical zones. They are also the closest relatives to angiosperms and have vessel elements in their xylem.
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The equation C6H12O6 + 6O2 6CO2 + 6H2O represents the process of ____
Fill in the blank with the appropriate word.
How long does it take for a biofilm to form?
a. seconds to minutes b. minutes to hours c. hours to days d. days to months e. months to years
UV light is used to produce vitamin D. Yet, why do people whose ancestors lived in the tropics have darker-colored skin?
A. Darker-colored skin allowed more production of vitamin D. B. Darker-colored skin protected vitamin D from degradation. C. Darker-colored skin keeps people warmer. D. Darker-colored skin was important for social interactions. E. Darker-colored skin provides protection against cancer-causing UV light.
Which term refers to a horizontal stem modified to penetrate the substrate and anchor a plant?
a. sporangium b. protonema c. shoot system d. rhizome