Quiz 2 questions Flashcards
(20 cards)
Lampreys and hagfishes are similar in that they both:\
Lack jaws
Have a notochord
Have a cranium
Lack paired appendages
All of the above
All of the above
Unlike eutherians, both monotremes and marsupials:
Lack nipples
Have some embryonic development outside the mother’s uterus
Lay eggs
Are found in Australia and Africa
Include only insectivores and herbivores
Have some embryonic development outside the mother’s uterus
Which of the following are the water-conducting cells of xylem, have thick walls, and are dead at functional maturity?
Parenchyma
Collenchyma
Sclerenchyma
Tracheids and vessel elements
Sieve-tube elements
Tracheids and vessel elements
Which of the following statements about phloem tissue is correct?
Phloem tissue distributes water and minerals absorbed by the roots to the rest of the plant
The sugar-conducting cells of the phloem are alive at functional maturity
Phloem may be primary or secondary, but in either case the sieve elements are non-living elements
The sugar-conducting cells of the phloem are alive at functional maturity
Annual rings are distinct traits in plants growing in:
Temperate regions
Grasslands
Tropical regions
Arctic regions
Desert regions
Temperate regions
Based on the ABC model, what would be the structure of a flower (in a cross section of the flower, from outside to the center) that had normal expression of genes A and B but lacked expression of gene C?
Carpel-petal-petal-carpel
Carpel-stamen-stamen-carpel
Sepal-petal-petal-sepal
Sepal-sepal-carpel-carpel
Carpel-stamen-carpel-stamen
Sepal-petal-petal-sepal
The correct order of organs for a flower (from outside to inside) is:
Carpel-stamen-petal-sepal
Sepal-petal-stamen-carpel
Carpel-sepal-petal-stamen
Sepal-stamen-petal-carpel
Sepal-petal-stamen-carpel
This can be used for Gene modelling, sepal is A gene, AB is petal, BC is stamen, and carpel is C
Active transport involves all of the following except:
Transport of solute against a concentration gradient
Diffusion of solute through the lipid bilayer of a membrane
Hydrolysis of ATP
Pumping of solutes across the membrane
Specific transport across in the membrane
Diffusion of solute through the lipid bilayer of a membrane
Some botanists argue that the entire plant should be considered as a single unit rather than a composite of many individual cells. Which of the following structures best supports this view?
The cell wall
The vacuole
The cell membrane
The plasmodesmata
The cytosol
The plasmodesmata
It is the channel in between two plant cells
A molecule in a plant is transported by staying within the cytosol as it moves from one plant cell to another. This molecule has taken which transport route
Transmembrane
Symplastic
Apoplastic
Protoplastic
Iconoplastic
Symplastic
The value for psi in root tissue was found to be -0.20 MPa. If you take the root tissue and place it in a 0.1 M solution of sucrose (psi=-0.23), net water flow would be:
Be from the tissue into the sucrose solution
Be from the sucrose solution into the tissue
Be in both directions and the concentrations would remain equal
Occur only as ATP was hydrolyzed in the tissue
Be impossible to determine from the values given here
Be from the tissue into the sucrose solution
Water potential moves from high to low
Which of the following is not part of the transpiration-cohesion-tension mechanism for the ascent of xylem sap?
Loss of water from the mesophyll cells, which initiates a pull of water molecules from neighboring cells
Transfer of transpirational pull from one water molecule to the next, owing to cohesion by hydrogen bonds
Active pumping of water into the xylem roots
Lowering of psi in the surface film of mesophyll cells due to transpiration
Active pumping of water into the xylem roots
The male gametophyte of an angiosperm is______.
The embryo sac
Contained within the pollen grain
The sperm cell
The synodal cell
Contained within the pollen grain
How many mitotic divisions are required for the conversion of the megaspore of the female gametophyte?
One
Two
Three
Four
Five
Three
_______ prevents seeds from germinating until conditions are favorable for the growth of the plant.\
Brassinosteroids
Auxin
Abscisic acids
Cytokinin
Abscisic acids
A coleoptile is grown with unidirectional light coming from the left. If the tip of the coleoptile is cut and a slice of agar is placed between the severed tip and the rest of the coleoptile, what will happen?
It will stop growing taller
It will grow taller and be straight, not bending
It will grow taller and bend to the right
It will grow taller and bend to the left
It will change color
It will grow taller and bend to the left
Which of the following statements is false about bulk flow?
It is more effective than diffusion over distances greater than 100 micrometers
It depends on the force of gravity on a column of water
It may be the result of either positive or negative pressure potential
It is driven primarily by pressure potential
It depends on the force of gravity on a column of water
How many mitotic divisions are required for conversion of the microspore to the male gametophyte?
One
Two
Three
Four
Five
One
When a growing shoot’s stem slows its elongation and becomes thicker, the shoot’s cells are responding to:
IAA
Ethylene
Carbon dioxide
Gibberellins
Abscisic acids
Ethylene
Which of the following plant hormones is not a growth promoter?
Auxin
Gibberellins
Cytokines
Abscisic acids
Brassinosteroids
Abscisic acids
