A virulent pathogen is one that

a plant has little defense against

the receptor is on the surface of the cell.

We know from the experiments of the past that plants bend toward light because

cell enlongation on the dark side of the stem due to auxin

studbud

Duplicate of AP Biology Ch 39

14 termsStudBud Administration33 plays

Ch 39 Campbell AP Biology Plant Communication

Flashcards14 cardsFPractice quizPHost liveL

Questions 14

Answers

1
Which plant hormones are most closely associated with cell division?
cytokinin
brassinosteriods
ethylene
abscisic acid
2
A virulent pathogen is one that
does not affect a plant
the plant kills on contact
a plant has little defense against
may harm but does not kill the plant
3
Which hormone allows plants to be more resistant to drought?
gibberellins
abscisic acid
auxin
cytokinens
4
Abscisic Acid
promotes growth
slows growth
causes seeds to germinate
kills the plant
5
Morphological adaptations for growing in darkness are collectively known as...
etiolation
tropism
de-etiolation
phototropism
6
What part of a grass coleoptile senses light?
The tip.
The site of curvature.
The roots.
Everything but the roots.
7
In this diagram...
cellular responses cannot occur.
the stimulus does not interact with the receptor.
the receptor is on the surface of the cell.
the receptors are on the inside of the cell.
8
The ripening of fruit and the dropping of leaves and fruit are principally controlled by
ethylene
carbon dioxide concentration (in air)
abscisic acid (ABA)
gibberellins
9
Roots growing around an obstacle is an example of
elongation
gravitropism
thigmotropism
tranduction
10
When a shoot reaches light, the plant undergoes changes, collectively known as...
de-etiolation
etiolation
tropism
phototropism
11
Growth of a plant toward or away from light.
phototropism
etiolation
tropism
de-etiolation
12
External stimuli would be received quickly if the receptors were located
in the nucleus
in the cytoplasm
on the cell membrane
in the mitochondria
13
We know from the experiments of the past that plants bend toward light because
the sun stimulates stem growth.
auxin is inactive on the dark side of the stem.
they need sunlight energy for photosynthesis.
cell enlongation on the dark side of the stem due to auxin
14
Roots exhibit what type of gravitropism
negative
both
they do not exhibit gravitropism
positive

Duplicate of AP Biology Ch 39 Flashcards | StudBud