Which type of plant hormone retards leaf aging?
a. salicylic acid
b. abscisic acid
c. cytokinins
d. ethylene
e. gibberellins
C
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Directional, light-triggered plant development is known as
A. thigmotropism. B. phototropism. C. thigmonasty. D. photomorphogenesis. E. acid-growth movement.
All of the following are used to construct a
theory with one exception. Select the exception.
a. repetitions of experiments. b. increased observations. c. time. d. faith. e. confirmation by many scientists
Which of the following is a correct interpretation of the wings of bats and the wings of birds?
a. They are analogous because they have a similar internal bone structure inherited from a common ancestor. b. They are homologous because they are adapted for the same function. c. They are homologous because they have a similar internal bone structure inherited from a common ancestor. d. They are analogous because the common ancestor of bats and birds had wings.
which of the following are primary sex organs
What will be an ideal response?