What is the main benefit that a plant receives from a mycorrhizal association?
a. removal of excess carbohydrates
b. enhanced water uptake
c. enhanced flow of carbohydrates to the roots
d. enhanced mineral ion uptake
Ans: d. enhanced mineral ion uptake
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If scientists want to develop plants better adapted to certain climates they need information about the plant's ability to:
A. bind membrane proteins B. transport solutes passively C. make dehydrins D. take up minerals E. transport calcium
Consider that you have access to use fluorescent tagging of specific proteins and view cells in a confocal microscope. You isolate a cell with the fluorescent dyes, showing that a very tiny, single-celled organism has not only a cell membrane, but internally folded membranes. You determine also that the membranes do not completely surround internal specialized compartments of the cell. You identify this as
A. a prokaryote. B. a yeast. C. a eukaryote. D. a plant. E. an animal.
The biomass of a community is the weight of the
a. material decomposed in a year. b. producers. c. living organisms. d. consumers. e. decomposers.
Neural crest cells at the dorsal surface of the neural tube
A. form the notochord. B. differentiate into the brain. C. form the overlying ectoderm. D. migrate to many different regions of the body. E. control the segmentation of somatic mesoderm.