Additional vascular tissue produced as secondary growth in a root originates from which cells?
A) vascular cambium
B) apical meristem
C) endodermis
D) xylem
A
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Which of the following domains consists of organisms whose cells lack nuclei?
a. Bacteria and Eukarya b. Archaea and Eukarya c. Archaea and Bacteria d. all of the choices
Sea cucumbers belong to the class:
a. Asteroidea. b. Ophiuroidea. c. Echinoidea. d. Holothuroidea. e. Crinoidea.
Why is colony collapse disorder (CCD) a problem for all of us?
a. the pathogen responsible for CCD can infect multiple hosts b. the decline in honey production could cause our economy to collapse c. bees are essential as key pollinators of our agricultural crops d. actually, it’s not-- there are other pollinators that can take over for the bees e. bees could spread this disease to humans through their honey
In the case of temperature regulation, integration is accomplished by
a. a receptor in the brain. b. a center in the brain. c. muscles and glands. d. none of the above.