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COMPREHENSION CHECK
1. Say whether the following statements are true or false:
a. Flowers which consist of sepals, petals stamens and carpels are called incomplete flowers.
b. The central part of the flower, and the part farthest along the receptacle is the carpel, which is composed of modified floral leaves that have become folded over to protect the ovule from otherwise predacious pollenators.
c. The pollen grains are the female gametophytes.
d. Triploid tissue constitutes the nutritious part of most grains and many seeds that are eaten by much of the world’s human population.
e. After fertilization the angiosperm ovary, which surrounds the embryo develops into the bud, which acts as an agent of dispersal.
f. Monocots are the most numerous and the most successful plants alive.
2. Give detailed answers to the questions below:
a. What does the typical flower consist of?
b. What is the difference between complete flowers and incomplete flowers?
c. What does the perianth include?
d. What is the anther?
e. What does the central part of the flower consist of?
f. What happens when the pollen reaches the stigma?
g. After fertilization the angiosperm ovary develops into the fruit, doesn’t it? How does the fruit act then? What helps in the dispersal process?
h. How do monocots differ from dicots? And what are the most successful plants alive? Why?
LANGUAGE FOCUS
1. Complete the table (where possible):
| Noun | Verb | Adjective |
| to constitute | ||
| plant | ||
| modified | ||
| to divide | ||
| to create | ||
| receptive | ||
| to extend | ||
| to protect | ||
| nutritious | ||
| to include | ||
| respect | ||
| to ingest |
3. Define the following terms:
| incomplete flowers | carpel | monocots | anther | dicots | perianth |
| complete flowers | receptacle | filament | pistil | corolla | endosperm |
4. Match the first half of a sentence in column A with the appropriate second half in column B:
| A | B |
| 1. After the sepals are the petals, the next structures attached to the receptacle, | a) creating four haploid megaspores. |
| 2. The pistil consists of one or more carpels | b) forming a diploid fusion nucleus. |
| 3. Each one divides miotically | c) which is part of the modified stem. |
| 4. Two polar nuclei from the female gametophyte combine | d) in the center of the flower. |
| 5. This protects the embryo from desiccation | e) in multiples of three. |
| 6. The flower parts are normally | f) during the early stages of development. |
5. Put the parts of the sentences in the right order:
a. In, or, carpels, flower, of, the, pistil, the, of, consists, one, center, more, the.
b. Ovules, are, sporangia, these, called, the.
c. Four, of, sporangia, anther, consists, each.
d. Triploid, nucleus, tissue, triploid, as, endosperm, creates, the, known, a.
e. Cotyledon, monocots, have, as, often, are, embryos, called, they, one, with.
FOLLOW-UP ACTIVITIES
Divide the text into parts and give a title to each of them.
2. Prepare dialogues discussing: a) the structure of the flower; b) the way of pollen; c) two subgroups of the angiosperms.
Prepare a report on the topic under discussion.
CONTENTS
Unit 1. Viruses and Subviruses 3
Unit 2. Monera 10
Unit 3. Protista 16
Unit 4. Fungi 20
Unit 5. Plant Kingdom: Plantae 28
Unit 6. Bryophyta. Vascular Plants. Psilophyta. Lycophyta 34
Unit 7. Sphenophyta. Pterophyta. Gymnosperms. Cycadophyta. Ginkgophyta 40
Unit 8. Coniferophyta: Conifers. Anthophyta/Angiosperms: Flowering Plants 46
Unit 9. Typical Flower 51
Date: 2016-01-03; view: 670
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