Ch33, Plants hormones 33.1,2,3

Question 1

The growth response that results in plant organs curving toward or away from a stimulus:
a. Elongation c. Tropism
b. Germination d. Dormancy

Answer 1

c. Tropism

Question 2

___________ is the growth of an organ in response to light:
a. Phototropism c. Gravitropism
b. Thigmotropism d. Elongation

Answer 2

a. Phototropism

Question 3

The chemical signal that is produced in one part of plant body and transported to other parts:
a. Stomata c. Agar
b. Tropism d. Hormone

Answer 3

d. Hormone

Question 4

The first plant hormone which was discovered by scientists:
a. Auxin c. Cytokinin
b. Gibberellin d. Ethylene

Answer 4

a. Auxin

Question 5

___________ experiments on phototropism: Detection of light by shoot tips and evidence for a chemical signal:
a. The Darwins’ c. Peter Boysen-Jensen’s
b. Frits Went’s d. Archimedes’

Answer 5

a. The Darwins’

Question 6

___________ concluded that the tip of a shoot is responsible for sensing light:
a. The Darwins c. Peter Boysen-Jensen
b. Frits Went d. Archimedes

Answer 6

a. The Darwins

Question 7

___________ hypothesized that some chemical signal must be transmitted from the tip downward to the growth region of the shoot:
a. The Darwins c. Peter Boysen-Jensen
b. Frits Went d. Archimedes

Answer 7

a. The Darwins

Question 8

According to The Darwins’ experiment, a plant shoot bends toward the light when the tip is:
a. covered by opaque cap
c. covered by transparent cap
b. removed
d. Both a+b

Answer 8

c. covered by transparent cap

Question 9

___________ used gelatin block and thin piece of mica in his experiment:
a. The Darwins c. Peter Boysen-Jensen
b. Frits Went d. Archimedes

Answer 9

c. Peter Boysen-Jensen

Question 10

10. ___________ experiments: evidence that a chemical signal is responsible for shoot bending:
    a. The Darwins’ c. Peter Boysen-Jensen’s
    b. Frits Went’s d. Archimedes’

Answer 10

c. Peter Boysen-Jensen’s

Question 11

___________ used blocks of agar in his experiment:
a. The Darwins c. Peter Boysen-Jensen
b. Frits Went d. Archimedes

Answer 11

b. Frits Went

Question 12

___________ experiments: isolation of the chemical signal:
a. The Darwins’ c. Peter Boysen-Jensen’s
b. Frits Went’s d. Archimedes’

Answer 12

b. Frits Went’s