Plant Biology questions that I\'m not sure of: 1. The term alternation of genera
ID: 174348 • Letter: P
Question
Plant Biology questions that I'm not sure of:
1. The term alternation of generations describes the life cycle of an organism, such as a moss, that has a
a. unicellular diploid phase and a multicellular haploid phase
b. multicellular diploid phase and a multicellular haploid phase
c. multicellular diploid phase and a unicellular haploid phase
d. zygote that divides immediately by meiosis
2. Which of the following is a characteristic of all living organisms?
a. reproduction c. metabolism
b. response to stimuli d. all of these
3. The _____ is a stack of flat, disk-shaped membranes involved in the secretion of the cell wall material; this term is used by some, but not all botanists.
a. plasma membrane d. dictyosome
b. endoplasmic reticulum e. thylakoid
c. cytoskeleton
4. Almost all new cells produced by a growing plant arise from the
a. protoderm
b. procambium
c. apical meristems of the root and shoot
d. highly vacuolated cells of the ground meristem
e. primary meristems of the cotyledons
5. Most carbohydrate is transported through a plant in the form of
a. glucose b. fructose c. starch d. hemicellulose e. sucrose
6. _____ may be described as long, thin tapered cells with lignified cell walls that have pits that function in support and water flow
a. Parenchyma d. Tracheids
b. Sclerenchyma e. Sieve tube elements
c. Collenchyma
7. _____ is an example of a complex tissue.
a. Collenchyma b. Parenchyma c. Sclerenchyma d. Epidermis
8. Which of the following is not a characteristic of collenchyma cells?
a. nonlignified primary walls d. extensible cell walls
b. elongated cells called fibers e. unevenly thickened cell walls
c. living prototplasts at maturity
9. Which of the following is not a major function of roots?
a. absorbing water & minerals from the soil c. synthesizing sugars
b. synthesizing alkaloids & hormones d. anchoring the plant in the soil
10. Which is not characteristic of a shoot apical meristem?
a. It is involved in the formation of bud primordial.
b. It is involved in the formation of leaf primordial.
c. It produces new cells.
d. It is covered by a protective cap.
11. Which does not function to reduce water loss from leaves?
a. the cuticle c. sunken stomata
b. epidermal hairs d. spongy parenchyma on both sides of the leaf
12. Bulliform cells
a. are found in the mesophyll of grass leaves
b. are involved in the rolling and unrolling of grass leaves
c. regulate water movement in and out of the epidermis
d. function in loading sugars into the veins
13. The seeds of some desert species require rainfall to overcome dormancy because the rain must first
a. moisten the seed coat
b. weaken the seed coat
c. moisten the embryo
d. leach away inhibitors
14. The transfer of genes between species that are not capable of forming hybrids is made possible by the technique to
a. clonal propagation c. protoplast fusion
b. meristem culture d. genetic engineering
15. If male and female flower parts are in separate flowers but both are on the same plant, the species is said to be
a. complete b. fertile c. monoecious d. dioecious
16. When the shoot tip of a bean plant is cut off and auxin is then placed on the cut stump
a. the plant dies d. lateral buds begin to grow
b. the stem grows faster e. new lateral roots form
c. lateral buds are inhibited
17. Which of the following would not be an effective way of inducing germination in seeds kept dormant by the presence of inhibitors in the seed coat?
a. soaking in water
b. mechanically abrading the seed coat with sandpaper or a file
c. breaking the seed coat
d. all of these methods would be effective
18. Pulvini
a. are found at the base of a leaf or leaflet
b. can undergo rapid changes in turgor
c. are responsible for thigmonasty in Mimosa.
d. all of the above are true
19. Which of the following is not a characteristic of phytochrome?
a. it exists in two interconvertible forms
b. it is a pigment
c. in direct sunlight, most is in the PR form
d. in darkness, PFR is converted to PR
e. PR absorbs red light and PFR absorbs far-red light
20. Compared to plants growing in direct sunlight, plants growing in shade have
a. more exposure to red light d. a higher level of Pr
b. a higher level of Pfr e. more exposure to blue light
c. slower stem growth
21. Lettuce seeds will germinate if they are exposed to
a. far red light.
b. far red light followed by red light.
c. red light followed by far red light.
d. far red light followed by red light followed by far red light.
22. The Ti plasmid carries genes for the synthesis of
a. ethylene only. d. auxin and cytokinin.
b. auxin only. e. gibberellin and cytokinin.
c. cytokinin only.
23. Which statement about Agrobacterium tumefaciens is correct?
a. It is a natural genetic engineer.
b. It is used for gene transfer.
c. It is used for micropropagation.
d. a and b are true
e. all of the above are true
24. What are the main products of light-dependent noncyclic electron flow (the Z scheme)?
a. carbon dioxide and water d. ATP and sugars
b. oxygen and sugar e. NADPH, ATP, and oxygen
c. NADPH and carbon dioxide
25. Alternation of generations is a term describing the life cycle of organisms that have
a. a zygote that divides immediately by meiosis.
b. a multicellular diploid phase and a unicellular haploid phase.
c. a multicellular haploid phase and a multicellular diploid phase.
d. a multicellular haploid phase and a unicellular diploid phase.
26. Which of the following is not a component of the endomembrane system?
a. chloroplast b. endoplasmic reticulum c. plasma membrane
27. ____ fruits develop from the ovary without seed formation.
a. Simple b. Aggregate c. Parthenocarpic d. Apomictic e. Asexual
28. Which of the following is not a secondary plant product?
a. nicotine b. pyrethrum c. solanine d. sucrose
Explanation / Answer
1. The answer is: b. multicellular diploid phase and a multicellular haploid phase.
The term alternation of generations describes the life cycle of an organism, such as a moss, that has a multicellular diploid phase and a multicellular haploid phase.
2. The answer is: d. all of these.
Reproduction, metabolism and respond to stimuli are all characteristics of an living organism.
3. The answer is: d. dictyosomes.
The dictyosomes is a stack of flat, disk-shaped membranes involved in the secretion of the cell wall material; this term is used by some, but not all botanists.
5. The answer is: e. sucrose.
Most carbohydrate is transported through a plant in the form of sucrose.