Which layer of cells controls the movement of nutrient minerals entering the xylem in the root's
interior?
a. endodermis
b. Casparian strip
c. epidermis
d. cortex
e. periderm
A
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Why did the scientists assume the plants and
animals they encountered in the cloud forest on top of New Guinea’s Foja Mountains had never been encountered by other humans before?
a. these species were unknown to even the native peoples b. the animals were unafraid of humans c. they found some species that were thought to have been extinct for decades d. none of these answers are correct e. all of these answers are correct except d
Are any of these vegetables actually fruit?
A. Carrots B. Sugar beets C. Corn D. Celery E. All of these are vegetables, none of them are fruit.
A biologist uses a time machine to collect living material from 2 different time periods. Sample A is 3 billion years old and sample B is 1.5 billion years old. How would these samples differ?
A. Eukaryotic organisms would be absent from sample A. B. Eukaryotic organisms would be present in both samples but much more common in sample B. C. Prokaryotic organisms would be abundant in sample A but absent from sample B. D. Prokaryotic organisms would only occur in sample B.
The major way in which therapeutic cloning and reproductive cloning differ is that
a. reproductive cloning cannot in reality be accomplished, while therapeutic cloning can. b. therapeutic cloning seeks to provide cells and tissues for use in treatment of human diseases. d. reproductive cloning can only be done in plants, therapeutic cloning only in animals. e. reproductive cloning uses adult stem cells, therapeutic cloning uses embryonic stem cells. f. There is no difference: both processes seek to obtain a genetically pure individual.