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Bio 104 Final Exam Questions and Answers
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Bio 104 Final Exam Questions and Answers
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Bio 104 Final Exam Questions andAnswers
1. Growth and development of plant parts involves ________. - Answer -I) cell division
to produce new cells
II) enlargement and elongation of cells
III) specialization of cells
D. I, II, and III
2. Totipotency is a term used to describe a cell's ability to give rise to a complete new
organism. In plants, this means that ________. - Answer -C) cell differentiation depends
largely on the control of gene expression
3. Which of the following is the correct order of floral organs from the outside to the
inside of a complete flower? - Answer -D) sepals → petals → stamens → carpels
4. During the alternation of generations in plants, ________. - Answer -B) mitosis
produces gametes
5. Sperm cells are formed in plants by ________. - Answer -C) mitosis in male
gametophyte
6. A researcher has developed two stains for use with seed plants. One stains
sporophyte tissue blue; the other stains gametophyte tissue red. If the researcher
exposes pollen grains to both stains, and then rinses away the excess stain, what
should occur? - Answer -C) The pollen grains will have red interiors and blue exteriors.
7. In which of the following pairs are the two terms equivalent? - Answer -B) embryo sac
— female gametophyte
8. The generative cell of male angiosperm gametophytes is haploid. This cell divides to
produce two haploid sperm cells. What type of cell division does the generative cell
undergo to produce these sperm cells? - Answer -mitosis
9. Which of the following statements regarding flowering plants is correct? - Answer -C)
Pollination is the delivery of pollen to the stigma of a carpel.
, 10. In a typical angiosperm, what is the sequence of structures encountered by the tip of
a growing pollen tube on its way to the egg? - Answer -A) 4 → 2 → 3 → 1
11. Double fertilization means that ________. - Answer -B) one sperm is needed to
fertilize the egg, and a second sperm is needed to fertilize the polar nuclei
12. A typical angiosperm embryo sac (female gametophyte) has ________ cells. -
Answer -C) 8
13. Double fertilization in angiosperm embryo sac produces endosperm, a food-storing
tissue of the seed. The genetic makeup of endosperm is Section: 38.1________. -
Answer -B) 3n
14. In a typical dicot ovule, a surviving megaspore divided by ________ consecutive
mitotic divisions without cytokinesis results in ________ nuclei. S - Answer -B) 3; 8
15. Which of the following is correctly paired with its life cycle generation? - Answer -A)
anther—sporophyte
16. Which of the following flower parts develops into a seed? - Answer -A) ovule
17. The egg of a plant has a haploid chromosome number of 12 (n = 12). What is true
about the number of chromosomes in the cells of other tissues of this plant? - Answer -
D) The endosperm has 36 chromosomes.
18. Which of these events occurs first in seed germination? - Answer -C) Water is taken
up
19. Plants produce more seeds when they reproduce asexually than sexually. Yet most
plants reproduce sexually in nature. What is the probable explanation for the prevalence
of sexual reproduction? Sexual reproduction ________. - Answer -C) mixes up alleles,
contributing to variation in a species
20. Many flowering plants coevolve with specific pollinators. The Madagascar orchid
has a 12-inch floral tube and is a reliable nectar source for the hawkmoth, which has a
correspondingly long proboscis (tongue). Which statement most accurately describes
how coevolution might have occurred for the hawkmoth and Madagascar orchid? -
Answer -B) Natural selection would favor orchids with nectar tubes just long enough to
for an insect with pollen to make contact. Hawkmoths whose tongue could reach the
deep tubes would be more fit.
21. A fruit is - Answer -A) a mature ovary
22. Double fertilization means that - Answer -B) one sperm is needed to fertilize the
egg, and a second sperm is needed to fertilize the polar nuclei
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