Which of the following best describes basal angiosperms?
a. a group of seed plants that exhibit traits of monocots and dicots
b. a group of seedless plants that produce large fronds and cones
c. a group of plants in which a network of cells transport water
d. a group of plants that lack vascular tissue for transporting nutrients
a. a group of seed plants that exhibit traits of monocots and dicots
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In an HIV infection the TH cells and macrophages are NOT commonly infected
Indicate whether the statement is true or false.
Skin color in humans is a(n) ____________________ trait
Fill in the blank(s) with correct word
How is glucose involved in catabolite repression of the lac operon?
A) Glucose causes cAMP levels to increase, which leads to increased CRP binding and the lac operon is activated even when lactose is present. B) Glucose causes cAMP levels to decrease, which leads to decreased CRP binding and the lac operon is repressed even when lactose is present. C) Glucose is also a substrate for ?-galactosidase and thus competes with lactose for this enzyme. D) Glucose activates transcription of the lacI gene to increase the amount of Lac repressor in the cell.
If the kidneys cannot excrete enough acid, which condition occurs?
a. metabolic alkalosis b. respiratory acidosis c. metabolic acidosis d. respiratory alkalosis e. compensatory alkalosis