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BIOL 1262 Living Organisms 1

TUTORIAL WK 7

BIOL1263 Living Oranisms II

Writing across the curriculum exercise (5%)

BIOL 1262 Living Organisms 1

TUTORIAL 2 WK 8

PROKARYOTES

1. Explain how the activity of early prokaryotic organisms led to conditions favourable forevolution of higher life forms.

2. Compare and contrast Cyanobacteria and Archaebacteria.

3. As seen in the first lab, Gram positive and Gram negative bacteria stain differently with theGrams procedure. Explain this difference.

4. Describe the mode of nutrition for chemoautotrophs.

BIOL 1262 Living Organisms 1

TUTORIAL 3 WK 9

Upload the Dichotomous key beforehand; students work at home on exercise keying outspecimens from the lab. Bring completed sheet to tutorial.

ALGAE & DICHOTOMOUS KEYS

1. Construct a dichotomous key which could be used to identify the algal specimens seen inthe lab.

2. Define the term algae.

3. Which specimens viewed in the lab belong to the Chlorophyta and why?

4. Which specimens studied in the lab belong to the Phaeophyta and Why?

5. Were the adaptive features of the organisms indicative of the habitat they occupy? Explain.

6. Describe the various body forms found in the green algae and explain with the aid ofdiagrams how they may have evolved from a unicellular photosynthetic organism.

Other Activities: In-course Exam #1 (10%)

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Document Prepared by GCBriggs October 2013

BIOL 1262 Living Organisms 1

TUTORIAL 4 WK 10

BRYOPHYTES

1. Why are the bryophytes restricted to moist habitats?

2. In the liverworts is the gametophyte or the sporophyte plant dominant and why? What isthe spacial and nutritional relationship between the plants?

3. Are the plants produced by the gemmae genetically identical to the parent gametophyte andto each other?

4. How are the spores of the Riccia sp . sporophyte released and dispersed? What is theadvantage of having the sporophyte thallus raised above the surface of the thallus as is the

case with Marchantia ?

5. Are the spores produced by the moss sporophyte haploid or diploid and how are theyformed by mitosis or meiosis?

6. Are the gametes produced by the gametophyte haploid or diploid, how are they formed bymitosis or meiosis?

7. What is the dominant generation for the mosses?

8. What feature of the moss life cycle differs from the life cycle of other land plants?

9. What adaptive features for life on land do these plants possess? Can they be consideredideal land plants?

BIOL 1262 Living Organisms 1

TUTORIAL 5 WK 11

CLUB MOSSES AND FERNS

1. Answer the following questions as it relates to the Microphyllophyta and the Pteridophyta.

a) Is the gametophyte autotrophic or heterotrophic?

b) Is the sporophyte autotrophic or heterotrophic?

c) Which phase of the life cycle is more conspicuous (larger) and lives longer (persists) in thelife cycle?

2. Members of the Microphyllophya and the Pteridophyta require water for completion oftheir life cycle. Explain this statement.

3. Describe the sporophyte generation of the fern and the club moss so as to distinguishbetween them.

4. How do club mosses differ from true mosses (ie. Bryophyta)?

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5. Describe the mechanism of spore release in ferns. What does this tell you about sporedistribution of these plants?

6. Describe the gametophyte generation of the fern and give another name for this generation.

7. Is the new plant which develops after fertilization in ferns haploid or diploid? What is thefate of the gametophyte following fertilisation?

BIOL 1262 Living Organisms 1

TUTORIAL 6 WK12

THE SEED HABIT & GYMNOSPERMS

1. Define an ovule in the gymnosperms

2. What two factors were essential to the development of the seed habit?

3. Describe the seed in terms of evolution from a megaspore.4. List 5 key adaptations of seed plants

5. What advantages do seeds have over spores?

6. Describe what reductions occur in the gametophytes of the seed plants.

7. Labeled drawing of a seed.

Other Activities: In-course Exam #2 (10%)