BIO 116 EXAM 2 TEST PAPER COMPLETE
SOLUTIONS AND ACCURATE RESPONSES
●● Which of the following is/are true regarding plant growth?
I.Elongation occurs at meristem
II.Grown pattern is indeterminate
III.Rapid growth occurs in response to high ABA
Answer: I and II
●● Which of the following hormone -- function pairs are correct?
I.Auxin - phototropism
II.Cytokinin - regulates cell division
III.ABA - inhibits germination
IV.Ethylene - triple response
Answer: I, II, III, and IV
●● Plant cuticles and reptile scales both prevent dessication. Although
these two structures have similar function, plants and reptiles do not
share a terrestrial common ancestor. This is an example of
Answer: convergent evolution
●● What are some functions of the shoot system?
,Answer: Photosynthesis, support leaves, height, transport sugar and
water
●● Which of the following are TRUE for hormones found in BOTH
plants and animals?
I.Can interact with other hormones
II.Can be gasses
III.Can have multiple effects
IV.Can be antagonistic to other hormones
V.Require high concentrations
Answer: I, II, III, and IV
●● Functions of dermal tissue
Answer: Protection, prevention of water loss, water absorption at root
hairs
●● Functions of ground tissue
Answer: photosynthesis, storage, support, short distance transport
●● Functions of vascular tissue(plants)
Answer: transport and structural support
●● Xylem
,Answer: vascular tissue that carries water upward from the roots to
every part of a plant
●● cohesion-tension hypothesis
Answer: transpiration and water cohesion pull water from shoots to roots
●● Phloem
Answer: carries sugar and organic substances throughout a plant,
translocation of sugars from source to sink
●● pressure-flow hypothesis
Answer: pressure gradient exists between source where sugar is loaded
into phloem (high pressure) and sink where sugar is removed from
phloem (low pressure)
●● plasmodesma
Answer: an open channel through the cell wall that connects the
cytoplasm of adjacent plant cells, allowing water, small solutes, and
some larger molecules to pass between the cells; continuity between 2
cells
●● indeterminate growth
Answer: growth occurs throughout the plant's life
, ●● primary growth
Answer: Growth produced by apical meristems, which lengthen stems
and roots
●● secondary growth
Answer: Growth produced by lateral meristems, thickening the roots and
shoots of woody plants
●● antagonistic hormones
Answer: hormones that have opposing physiological properties, but that
work together
●● Scientists have discovered a parasitic fungus whose hyphae invade
plants by piercing the cuticle on leaves. Which of the following best
describes the most immediate effect of the fungus on the plant?
a. Materials will move between adjacent cells less efficiently
b. Water will no longer move from the root xylem into the soil
c. Water will be lost via desiccation
d. Water transport in stem xylem will be inhibited
e. Sugar transport from source to sink will not occur
Answer:
●● Auxin
SOLUTIONS AND ACCURATE RESPONSES
●● Which of the following is/are true regarding plant growth?
I.Elongation occurs at meristem
II.Grown pattern is indeterminate
III.Rapid growth occurs in response to high ABA
Answer: I and II
●● Which of the following hormone -- function pairs are correct?
I.Auxin - phototropism
II.Cytokinin - regulates cell division
III.ABA - inhibits germination
IV.Ethylene - triple response
Answer: I, II, III, and IV
●● Plant cuticles and reptile scales both prevent dessication. Although
these two structures have similar function, plants and reptiles do not
share a terrestrial common ancestor. This is an example of
Answer: convergent evolution
●● What are some functions of the shoot system?
,Answer: Photosynthesis, support leaves, height, transport sugar and
water
●● Which of the following are TRUE for hormones found in BOTH
plants and animals?
I.Can interact with other hormones
II.Can be gasses
III.Can have multiple effects
IV.Can be antagonistic to other hormones
V.Require high concentrations
Answer: I, II, III, and IV
●● Functions of dermal tissue
Answer: Protection, prevention of water loss, water absorption at root
hairs
●● Functions of ground tissue
Answer: photosynthesis, storage, support, short distance transport
●● Functions of vascular tissue(plants)
Answer: transport and structural support
●● Xylem
,Answer: vascular tissue that carries water upward from the roots to
every part of a plant
●● cohesion-tension hypothesis
Answer: transpiration and water cohesion pull water from shoots to roots
●● Phloem
Answer: carries sugar and organic substances throughout a plant,
translocation of sugars from source to sink
●● pressure-flow hypothesis
Answer: pressure gradient exists between source where sugar is loaded
into phloem (high pressure) and sink where sugar is removed from
phloem (low pressure)
●● plasmodesma
Answer: an open channel through the cell wall that connects the
cytoplasm of adjacent plant cells, allowing water, small solutes, and
some larger molecules to pass between the cells; continuity between 2
cells
●● indeterminate growth
Answer: growth occurs throughout the plant's life
, ●● primary growth
Answer: Growth produced by apical meristems, which lengthen stems
and roots
●● secondary growth
Answer: Growth produced by lateral meristems, thickening the roots and
shoots of woody plants
●● antagonistic hormones
Answer: hormones that have opposing physiological properties, but that
work together
●● Scientists have discovered a parasitic fungus whose hyphae invade
plants by piercing the cuticle on leaves. Which of the following best
describes the most immediate effect of the fungus on the plant?
a. Materials will move between adjacent cells less efficiently
b. Water will no longer move from the root xylem into the soil
c. Water will be lost via desiccation
d. Water transport in stem xylem will be inhibited
e. Sugar transport from source to sink will not occur
Answer:
●● Auxin
