Which type of angiosperm typically has parallel leaf veins and a fibrous root system?
A. Ferns
B. Dicot
C. Conifer
D. Monocot
Answer: D
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Which of the following is true regarding transformed cells that are plated on growth media containing ampicillin?
A. Each colony began with one antibiotic resistant cell. B. All cells in a single colony are resistant to the antibiotic ampicillin. C. Only the founder cell of a single colony is resistant to the antibiotic ampicillin. D. Cells that did not take up the plasmid will survive on the medium. E. Each colony began with one antibiotic resistant cell and all cells in the colony are resistant to the antibiotic ampicillin.
Activated helper T (TH) cells or cytotoxic T (TC) cell clones differentiate into:
What will be an ideal response?
In plant roots, the Casparian strip is correctly described by which of the following?
a) It ensures that all minerals are absorbed from the soil in equal amounts. b) It provides energy for the active transport of minerals into the stele from the cortex. c) It provides increased surface area for the absorption of mineral nutrients. d) It ensures that all water and dissolved substances must pass through a cell membrane before entering the stele. e) It is located in the walls between endodermal cells and cortex cells.
Explain, in ecological terms, why cattle ranchers and conservationists have battled one another over cattle-grazing practices in the western shortgrass prairie biome of the American West. How has grazing changed the habitat?
What will be an ideal response?