Lower Plants (BOTS2101)
Biological Science - BS
Semester: First Semester
Level: 200
Year: 2013
Continuous Assessment of BOTS 2101: Lower Plant
Date: 27
th
January 2014
Duration: 2 hours
Time: 10-12 AM
Marked on 30
Section A and B
Questions 1 to 20: Write the letter of the one phrase or word that best answers each question
or complete each statement.
1. What is the number of kingdoms recognized in the classification of Hogg and Hacckel?
a) 2; b) 5; c) 3; d) 6; e) 4
2. Protista are:
a) Single cell prokaryotic organisms, b) Multicellular organsism, c) pluricellular
eukaryotic organisms d) unicellular eukaryotic organisms.
3- Cryptogams are plants organisms that
a) posses leaves, roots and stems; b) posses stems, fruits and flowers c) do not produce
fruits,seed and flowers; d) produce flowers and fruits.
4. lower plants are plants which:
a) Posses vascular tissues; b) Do not posses root, stem, and leaves; c) sexual reproductive
organs; d) do not possess vascular tissues
5. Concerning conjugation in bacteria,
a) the two cells are generally of the same mating type; b) the two cells are generally in
contact thanks to flagella; c) the two cells are generally of different mating type; d) the
recipient bacteria is more big.
6- Saprotrophs bacteria
a) consume living organic matter, b) obtain their food by oxidizing inorganic compounds, c)
use sunlight as an energy source d) consume of dead organic matter.
7- Cyanobacteria are
a) autotroph b) parasites c) symbiotic d) saprophyte.
8- Chamydomonas is
a) Unicellular and monadoid. B) unicellular and coccoid c) colonial and flagellated d)
filumentous and trichoid.
9- The algae at the beginning of the food chain are
a) consumers, b) decomposers; c) producers d) heterotrophs
10- the red color in red algae comes from what photosynthetic pigment?
a) phycoerthrin, b) fucoxanthin, c) xanthophylls, d) carotene
10) (bonus) – haploid reductive cell that may divide and give rise to a new plant is called:
a) spore, b) gamete, c) zygote d) embryo
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11- The study of the evolutionary relationship between organisms is knows as?
a) Apormorphy b) Phylogenetics c) Phylogeny d) all answers are correct.
12- The ancestral form of land plants had what form in nature?
a) Elongated b) thalloid c) paraphyletic d) photosynthetic
13- Why are the respiratory pores of liverwort not called stomata?
a) they function in gas exchange b) they have a wall thickening c) they have no regulating
guard cells. D) they are hygroscopic
14- the bryophytes consist of the following groups of plants;
a) liverworts, hormworts and mosses only b) lichens, liverworts, Mosses and hornworts c)
liverworts and mosses only d) a + polysporangiophytes
15- This group of plant is characterized by the presence of specialized conductive cells
known as hydroids and leptoids.
a) Lichens b) liverwort and mosses c) Mosses only d) Hornworts
16- The sear of attachment of the adjacent three-spores of the four spores at meiosis lower
plants is known as …?
a) Elaters b) trilete mask c) Calyptra d) protenema
17- The long stalk of the moss sporophyte is known as …..
a) sporangium b) stipe c) calyptra d) peristome teeth
18- Which of the following is an example of an example of a crustose lichen?
a) Graphis scripta b) Graphis scripta c) Gyrophora d) usnea feanandae
19- The region of actively divding cells near the base of the sporophyte is c7 hornworts.
a) pseudo-elaters b) non homologous tissue c) columella d) intercalary meristem.
20- The specialized structures in liverworts that contain propagules that function in
reproduction.
a) Geninae b) Gemmae cups c) Antheridia d) Archeogonia
Answer section C on a separate sheet.
Fungi and viruses
1. In a tabular form only lists the sexual spores of the major groups of the higher fungi (2.5
marks).
2. In a tabular form only distinguish the Ascomycetes from the basidiomycetes (2.5 marks)
3. List four characteristics of fungi (2 marks)
4. Name six ways in which viruses can be named. (3 marks)
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