Question 1
Which of these plant hormones is associated with "silly rice disease"?
a, auxins
b. gibberellins
c. cytokinins
d. ethylene
Question 2
Which of these plant hormones is associated with the spoilage of a bushel of apples?
a. ethylene
b. cytokinin
c. indole acetic acid
d. gibberellic acid
Question 3
Plants obtain their organic nutrients (carbon, hydrogen, and oxygen) by:
Question 12 answers
a. ingesting food
b. photosynthesis
c. fermentation
d. chemosynthesis
Question 4
Which of these is NOT a primary plant macronutrient?
a. oxygen
b. potassium
c. phosphorous
d. nitrogen
Question 5
Which of these is NOT a typical component of soil?
a. air
b. water
c. organic matter
d. iron nails
Question 6
The phosphorus taken in by plant roots will be used by the plant to:
a. make ATP molecules
b. make DNA and RNA nucleotides
c. make NADP molecules
d. all of these
Question 7
Plants cannot use this component of the atmosphere directly; it must be modified by bacteria first.
a. oxygen
b. carbon dioxide
c. nitrogen
d. water vapor
Question 8
The case of a plant having nitrogen-fixing bacteria in its roots is an example of:
a. endosymbiosis
b. parasitism
c. mutualism
d. none of these
Question 9
Thin-walled extensions of the root epidermis that increase the surface area for absorption are called:
a. endodermis
b. root hairs
c. root caps
d. mycorrhizae
Question 10
Fungi growing in association with the root that greatly increase the surface area for absorption are called:
A. rhizobium
b. root hairs
c. root nodules
d. mycorrhizae
Question 11
The pathway water takes to reach the xylem cells in which it passes through each cell of the cortex is the ___ route.
a. extracellular
b. diffusional
c. intracellular
d. transpirational
Question 12
Which of the following cells is found in the xylem tissue?
a. companion cell
b. pericycle
c. sieve element
d. tracheid
Question 11
The Casparian stip of the endodermis is a waterproof layer that directs water:
a. around the endodermal cells from the xylem in to the cortex parenchyma
b. through the endodermal cell only when osmotic pressure will allow water into that cell
c. across the root hairs
d. into the plant leaves by transportation
Question 12
Water loss from the ___ of a plant creates a pull on water within the ___, causing water to be drawn upward in the plant.
a. cuticle, phloem
b. leaves, xylem
c. leaves, phloem
d. bark, parenchyma
Question 13
The closing and opening of stomatal guard cells involves:
a. diffusion of sodium ions
b. osmosis of water that swells and shrinks the cells
c. bulk flow of sugar
d. none of these
Question 14
The ___ of the guard cells cause the cells to uncover the stomata when they become turgid.
a. thick outer curve walls
b. thin inner curve walls
c. thick inner curve walls
d. thin linear walls
Question 15
Movement of sugar and water occurs in the ___ of the phloem.
Question 26 answers
a. companion cells
b. sieve cells
c. phloem parenchyma
d. tracheids
Question 16
The evaporation of water in plants to the atmosphere is called:
a. diffusion
b. osmosis
c. transportation
d. transpiration
Question 17
The ___ retains its nucleus and controls the translocation of sugar.
a. companion cell
b. sieve cell
c. phloem parenchyma
d. tracheid
Question 18
Plant fiber is a type of collenchyma cell.
True
False
Question 19
The part of the stem where flowers are attached is called the receptacle.
True
False
Question 20
Bacterial root infections by Rhizobium should be cured immediately.
True
False
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