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Bio 112 Test 3
Terms in this set (50)
A heterotroph sustains itself without eating anything derived from other organisms. True or False?
Photosynthesis takes place in the mesophyll layer in chloroplasts. True or False?
Chlorophyll a and b absorb green light, which is why the leaves of plants look green. True or false?
The reaction-center complex is an association of proteins that contains a special pairof chlorophyll a molecules and a primary electron acceptor. True or false?
Photosystem II functions first in the light reactions. True or false?
Plastoquinone, the cytochrome complex, and plastocyanin are the only moedules involved in moving electrons in photosynthesis. True or false?
P680 and P700 are made out of chlorophyll. True or false?
Rubisco catalyzes the reaction that makes NADPH. True or false?
What molecule/substance becomes reduced in photosynthesis?
What happens to the free energy released as electrons are passed from photosytem II to photosystem I through a series of electron carriers?
It is used to establish and maintain a proton gradient.
Where in a plant cell do the light reactions take place?
interior of the thylakoid (thylakoid space)
stroma of the chloroplast
Which molecule is the final electron acceptor for the electrons from photosystem I?
What is the function of the pigment molecules in a light-harvesting complex in the thylakoid membranes?
They absorb and transfer light energy to the reaction-center chlorophyll.
Which of the following processes is directly associated with photosystem II?
accepting electrons from the splitting of water
What are the products of cyclic electron flow during the light reactions of photosynthesis?
Which of the following plants make oxaloacetate to fix carbon?
C4 and CAM plants
What are the 3 Fs in the angiosperm life cycle?
double fertilization, fruit, and flowers
Which of the following is the correct order of floral organs from the outside to the inside of a complete flower?
sepals, petals, stamens, carpels
Which of the following is correct?
Gametophytes are haploid plants that produce gametes by mitosis
Arrange the following structures from largest to smallest, assuming that they belong to two generations of the same angiosperm:
carpel, ovary, ovule, egg
Sperm cells are formed in plants by _______.
mitosis in male gametophyte
Which of the following statements regrading flowering plants is correct?
Pollination is the delivery of pollen to the stigma of a carpel.
Double fertilization means that ________.
one sperm is needed to to fertilize the egg and a second sperm is needed to fertilize the polar nuclei
Which of the following flower parts develops into a seed?
Which part of the wheat kernel provides much carbohydrate, but very few nutrients?
Which of the following is a true statement about asexual reproduction in plants?
making cuttings of ornamental plants is a form of fragmentation.
Coevolution is when two species evolve during the same time in different locations from each other. True or false?
A female gametophyte gets its cells from the 3 surviving megaspores that are produced by meiosis. True or False?
The hypocotyl and epicotyl help to make the endosperm. True or false?
In some plants, the coleoptile pushes straight up through the soil which creates a tunnel for the shoot tip to go through. Almost all eudicots, including the garden bean, undergo this method of seed germination. True or false?
A blackberry forms fruit from a single flower with multiple separate carpels. This is known as a(n)
Which one of the following ways is NOT a mechanism that helps to prevent self-fertilization?
Which of the following mechanisms is the correct sequence of events that takes place during the plant responses to interal and external signals?
reception, transduction, response
Plant hormones produce their effects by _______.
I. altering the expression of genes
II. using post-translational processing
III. modifying the structure of the nuclear envelope
I and II only
The rapid leaf movcement resulting from thigmotropism primarly involve ________.
Which one of the following hormones major functions is regulating cell division in plants?
Shoots that grow vertically toward the sun can be characterized as ___________.
positive for phototropism and negative for gravitropism
Which of the following is NOT a major action of ethylene?
You are out working in your garden, and you notice that one of your favorite flowering plants has black, dead spots on the leaves. You immediately suspect that the plant has been invaded by a pathogen and has initiated a(n) _________.
A particular species of virus carries a gene for salicylate hydroxylase, an enzyme that breaks down salicylic acid. How will it affect its virulence compared to other viruses of the same species that do not have the gene? (The term virulent means to be severe or harmful in its effects.)
slows growth, promotes closure of stomata in dry conditions
abscisic acid (ABA)
stimulates fruit growth and stimulates stem elongation
stimulates stem elongation and is important in phototropism
involved in plant cell defenses (pathogen invasion) and wound healing
cell that forms the attachment of the embryo to the parent plant
plant graft that forms the root
cell in the pollen grain that forms the sperm
the organic material in a group of organisms in a particular habitat
when a plant population synchronously produces a large amount of seeds after a long interval
a type of plant that produces only male flowers or only female flowers on each individual
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