bio notes for price

1. Twenty Questions
Subject: Plants

2. Twenty Questions
1 2 3 4 5
6 7 8 9 10
11 12 13 14 15
16 17 18 19 20

3. 1. What are the major distinctions
betweens plants and algae
 Apical meristems
 Multicellular embryos dependent on the
parent plant
 Alternation of generations
 Sporangia that produce walled spores
 Gametangia that produce gametes

4. 2. Summarize the general process of
Alternation of Generations
 Male and female gametophytes produce
gametes by mitosis
 Fertilization results in a diploid zygote
 The zygotes undergoes mitosis and develops
into the diploid sporophyte
 The sporophyte produces haploid spores by
meiosis
 A spore develops by mitosis into a gametophyte

5. 3. What are the four major
divisions of plants?
 Bryophytes; seedless vascular plants;
gymnosperms; angiosperms

6. 4. Name and describe two reproductive
structures of angisperms.
 An angiosperm has its gametophytes in its
flowers and its seeds packaged inside fruits
 Anther- sac on stamen in which pollen grains develop
 Carpel- female; consists of a stalk an ovary at the
base and a sticky tip known as the stigma

7. 5. Name three types of plant tissue.
 Dermal, Vascular, Ground

8. 6. Name and describe three types of
plant cells.
 Parenchyma cells- most abundant; throughout
plant; perform most metabolism
 Collenchyma cells- grouped in cylinders; help
support growing parts of plant
 Schlerenchyma cells- exist where plant is no
longer growing; tough cell walls

9. 7. What are stomata and how do they
function?

10. 8. Give three distinguishing characteristics
of monocots and dicots.

11. 9. Name the hormone responsible for
fruit ripening.
 Ethylene

12. 10. Describe the xylem. What is the
driving force behind the movement
within?
 In xylem, it is actually tension (negative
pressure) caused by transpiration that drives
long-distance transport

13. 11. What is the function of auxin?

14. 12. Why is nitrogen important to
the plant? Where does it come
from?

15. 13. What is double fertilization?
 Two sperm nuclei of a pollen grain unite with
nuclei of the embryo sac of an angiosperm
 One sperm nucleus unites with the egg to form
the triploid, primary endosperm nucleus
 The other sperm unites with the two nuclei
located in a single cell at the center of the
embryo sac.
 Double fertilization is unique to angiosperms.

16. 14. What is phototropism and how
does it work?

17. 15. Name two adaptations that aid in
the uptake of water by roots.

18. 16. Explain the purpose of phloem and
how it moves substances.
 Sugar transport
 The phloem transports the organic products
of photosynthesis throughout the plant via
translocation
 Source to Sink

19. 17. What is the largest organelle in
most mature plant cells?
 Vacuole

20. 18. What is vascular cambium?
 The vascular cambium is a type of meristem in
the vascular tissue of plants. The vascular
cambium is the source of both the secondary
xylem (inwards, towards the pith) and the
secondary phloem (outwards), and is located
between these tissues in the stem and root. A
few leaves have a vascular cambium
 Found in Dicots and gymnosperms

21. 19. Name adaptations important for
terrestrial plants.
 Vascular tissue
 Must protect gametes, zygotes, and embryos
from drying out
 Produces gametes in gametangium
 Most release their offspring to the air or rely
on animals

22. 20. Summarize the results of the
transpiration lab.