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WSU Bio 106 Exam 1 Flashcards | StudBud
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WSU Bio 106 Exam 1
WSU Bio 106 Exam 1
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Answers
1
Movement of potassium ions in/out of guardcells is part of stomatal open and close.Which is INCORRECT when stomata open?
When guard cells are more turgid, the stomata / pores are more open
Water movement is driven by the principles of osmosis
K+enter the cell this lower the water potential driving water to enter cell
K+ leaves the cell this increases the water potential/water leaves the cell
2
What is the best definition of a plant hormone?
chemicalsubstancemadeinbodycontrols/regulatesactivityof certaincells/organs
volatilecompoundmade incoleoptileofwheatplantsaftercells exposedtobluelight
something that is needed to fix atmospheric nitrogen in leguminous plants
chemicalsubstancemadein plantbodythatispartofplasma membranebutnotcell wall
3
What 2 hormones regulate seed germination?
Auxin and gibberellin
Abscisic acid and gibberellin
Auxin and ethylene
Auxin and phytochrome
4
Which statement is INCORRECT about xylem?
Transport water
The cells types are tracheids and vessel elements
They are an example of parenchyma
The cells are dead when mature
5
Why is the vascular system so important?
It enables specialization of different structures/organs in the plant body
It enables plants to grow tall
It enables transport of water and sugars long distances
All these are true
6
What is the difference between macro- and micro- nutrients?
Macronutrients are carbon, molybdenum, hydrogen and nitrogen
Macronutrients are needed in higher amounts compared to micronutrients
Micronutrients are oxygen, sulfur, magnesium and nickel
Macronutrients are larger than micronutrients
7
What is NOT TRUE about plant cell elongation and related biology?
Cellulose is part of the cell wall
Cellulose arrangement determines direction of elongation
Plant cells expand in all directions equally
water up into cell and vacuole result in pressure pushes against cell wall
8
Which is NOT a mechanism of transport through plant tissues?
Photosynthetic
Symplastic
Apoplastic
Transmembrane
9
When the solute concentration is high the water potential will be..
Low
Solute concentration has no effect on water potential
High
Zero
10
What cell type are tree rings?
Vascular cambium
Secondary xylem
Primary xylem
Cork cambium
11
Which of following is NOT a modified epidermal cell?
Collenchyma
Trichomes
Guard cells
Root hairs
12
Which is a correct statement about osmosis?
movement of a solute up a gradient
water moves from higher to lower water potential
movement of a solute down a gradient
water moves from lower to higher water potential
13
Auxin is involved in phototropism. Which statement is INCORRECT about what it does?
The cell wall is loosened when the auxin concentration is higher
Auxin stimulates the proton pump, this lowers the pH of the cell wall
Auxin flow is redistributed on different sides of the shoot
Auxinstimulatesmorecelldivisionin shadedsideofshootcauses growthtowardlight
14
What is humus?
A tasty chickpea and garlic dip full of protein
The organic components of the soil
Silicate and all non-organic matter in the soil
The loamy part of the soil
15
What are the two types of cambium?
Xylem and phloem
Cork and bark
Primary and secondary
Vascular and cork
16
Which statement about the proton pump is INCORRECT?
Its activity sets up a membrane potential across the membrane
ATP is used
It transports protons out of the cell
It transports protons down their gradient
17
Where is the mesophyll?
Flowers
Leaves
Roots
Stems
18
Nitrogen fixing bacteria live in 2 places, which are they?
Soil and fungal hyphae
Roots and leaves
Soil and plant roots
Roots and shoots
19
Why is cation exchange important?
Soil pH regulates to what extent plants can tolerate pollution
Soil acidity is helpful to generate humus enriched soils
Changesoil pH is importantfor protonpumps to exchangeions btwn xylem/phloem
Mineral availability in the soil is strongly influenced by the pH
20
Why is turgor pressure so important for plants?
It provides the energy for photosynthesis
It causes wilting
It keeps them from wilting
It stops the plant from growing
21
What do the hypersensitive response and the systemic acquired resistance have in common?
They both involve gas exchange
They are both responses to herbivores
They both happen in the roots
They are both responses to pathogens
22
Auxin and statoliths are both involved in root gravitropism? Which statement about this process is correct?
The sites of gravity perception and response are in different locations
Auxin redistribution causes statoliths to move
Statoliths allow uptake of CO2 in the leaf
Higher auxin concentrations in root cause increased elongation on down side
23
In a root where is the apical meristem?
In the elongation zone
There is no apical meristem in the root, they are found at the shoot tip
Above the root cap
Right at the tip
24
What are the key differences between diffusion and active transport?
Diffusion things moving up a gradient, Active things moving down a gradient
Diffusion things moving down a gradient, Active things moving up a gradient
Diffusion- movement of protons, Active- movement of potassium
Diffusion movement of solutes dissolved in water, Active- movement of water
25
In which kind of transport is energy input required?
Osmosis
Diffusion
Plasmolysis
Active
26
Blue light photoreceptors are important in several different aspects of plant biology. Which is NOT one of these things?
Photosynthesis
Inhibition of hypocotyl growth
Phototropism
Stomatal opening
27
Plants require several basic things from their environment to survive. What is NOT on the list?
CO2
Sugar
Light
Nutrients
28
What is the difference between a stolon and a rhizome?
1connected with sexual reproduction other is mechanism asexual reproduction
One is found in some plants, one is found in some animals
One is a modified stem, one is a modified root
One is above ground, one is below ground
29
circadian rhythm: biological process oscillation of about 24hr, can continue even in absence of exogenous stimulus
True
False
30
What is NOT TRUE about the pneumatophore ?
You find them in plants that live in swampy, flooded environments
They stick up above the water surface
It is a modified leaf
It helps the roots obtain oxygen
31
Sugars move through the phloem from.....
shoots to roots
Roots to shoots
Sink to source
Source to sink
32
What structure connects the leaf to the stem?
petiole
tendril
axillary bud
apical bud
33
Plant response to drought stress in several different ways. Which is NOT on the list?
CO2 uptake is reduced
Stomata close
Photosynthesis increases
Water loss is reduced
34
What are PAMPS?
Pathogen associated molecular patterns
Pathogen associated miracle pesticides
Progressive aggressive molecular parts
Photosynthesis associated multiple plants
35
Why are leaves green?
Because that wavelength of light is used in photosynthesis
Because that wavelength of light is not used in photosynthesis
Because it is Dr. Ritchie’s favorite color
Because that kind of light does not have any energy
36
Where is the endodermis?
Next to the mesophyll
At the center of the pith
Surrounding the central vascular tissue
In between the epidermis and the cortex
37
How can you tell the difference between plants that are deficient in a mobile element versus an immobile element?
Mobile deficient young leaves pale; immobile deficiency-mature leaves pale
doing TYZ analysis you can measure levels of elements in diff part of plant
Mobile deficient-matures leaves pale; immobile deficiency-young leaves pale
no difference, plants able to transport all elements via xylem and phloem
38
Which of the following is NOT one of the basic plant tissues?
Dermal
Ground
Leaf
Vascular
39
Plants have many different mechanisms to defend against herbivory. Which is not on this list?
Physical structures
Behavioral mechanisms
Toxic chemicals
Phototropism
40
Which is not categorized as ground cell/tissue?
Sclerenchyma
Collenchyma
Parenchyma
Vascular
