What stimulates germination of desert plant seeds after a hard rain?
A) production of auxins
B) removal of abscisic acid
C) cooler temperatures
D) activation of cytokinins
Answer: B
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A hypothesis must be tested many times before it can be considered a theory.
Answer the following statement true (T) or false (F)
Which of the following statements concerning long-term potentiation is false?
a. It is involved in establishing memory. b. It involves an increased strength of synaptic connections. c. It occurs between two neurons. d. It occurs when action potentials are transmitted for less than one minute. e. It is involved in learning.
You've made a hot drink by dissolving a teaspoon of instant coffee and a teaspoon of sugar in a cup of hot water. Which of the following statements is true?
A) You've just prepared an aqueous solution. B) The water is the solute portion of the drink. C) The instant coffee is basic and the water is acidic so they mix well. D) The instant coffee and sugar dissolve because they have no charged regions to repel the partial positive and partial negative regions of the water molecules.
Which of the following is not recycled in an ecosystem?
a) Nitrogen b) Sulfur c) Carbon d) Energy