The diploid sporphyte is represented by a dominant, independent, photoshynthetic, vascular plant body. It alternates with multicellular, saprophytic/autotrophic, independent but short-lived haploid gametophyte. This type of pattern is exhibited by
1. Bryophytes (Sphagnum, Polytrichum).
2.Pteridophytes (Selaginella, Lycopodium).
3. Most of the algal genera (Fucus, Chara, Polysiphonia).
4. Seed plants (gymnosperms and antiosperms).
The type of life-cycle in which there is no free-living sporophytes and the dominant, photosynthetic phase in such plants is the free-living gametophyte. We are talking about
1.Haplontic life cycle shown in Volvox and some species of Chlamydomonas.
2.Diplontic life cycle as shown in seed-bearing plants.
3.Haplo-diplontic life cycle as shown in bryophytes and pteridophytes.
<p">4.Haplo-diplontic life cycle as shown in Kelps.
Read the following statements :
A. The male or female cones or strobili may be borne on same tree in Pinus.
B. In Cycas male cones and megasporophylls are borne on different trees.
C. Stem of Cycas is branched and of Pinus and Cedrus is unbranched.
D. In gymnosperms generally tap roots are found.
Select the correct statements.
1. A, B
2. A, B, D
3. A, B, C
4. C, D
Prothallus is
1. A structure in pteridophytes formed before the thallus develops.
2. A sporophytic inconspicuous free living structure formed in pteridophytes.
3. A gametophytic inconspicuous free living structure formed in pteridophytes.
4. A gametophytic conspicuous structure formed after fertilization in pteridophytes.
Leafy stage develops from the secondary protonema as a
1. Apical bud
2. Axillary bud
3.Lateral bud
4. Meristem
Moss peat is used as a packing material for sending flower and live plants to distant places because
1. It is easily available.
2. It reduces transpiration.
3. It is hygroscopic.
4. All of the above.
In Phaeophyceae, the spores (zoospores) are
1. Pyriform and bear 2 flagella (one longitudinal and other transverse).
2. Pear-shaped and bear 2 flagella that are laterally attached.
3. Pyriform and bear 2-8, equal and apial flagella.
4. Pear-shaped and bear 2-8, equal and apical flagella.
In chlorophyceae and phaeophyceae, the type of sexual reproduction is
1.Isogamous
2.Anisogamous
3.Oogamous
4. All of the above
Find out the incorrect statement about the Rhodophyceae.
1. Majority are marine with greater concentrations found in the warmer areas.
2. They are also found at great depths of oceans where relatively little light penetrates.
3. Usually reproduce vegetatively by fragmentation.
4. They reproduce asexually by biflagellate zoospores.
Read the following statement and find out the incorrect statement.
1. Algae usually reproduce vegetatively by fragmentation, asexually by formation of different types of spores and sexually by formation of gametes.
2. Algae are classified into three classes, pteridophytes into four classes and antiosperms into two classes.
3. Algae are chlorophyll bearing simple, thalloid, autotrophic and largely aquatic organisms.
4. The plant body of algae is more differentiated than that of bryophytes.
Read the following statements (a-e) and answer question that follows them.
(a) In liverworts, mosses and ferns gametophytes are free-living.
(b) Gymnosperms and some ferns are heterosporous.
(c) Sexual reproduction in Fucus, Volvox and Albugo is oogamous.
(d) The sporophyte in liverworts in more elaborate than that in mosses.
(e) Both, Pinus and Marchantia are dioecious.
How many of the above statements are correct?
1. One 2. Two
3. Three 4. Four
Read the following statements.
(a) Gymnosperms are heterosporous.
(b) Bryophytes have well developed vessels and sieve tubes.
(c) Strobilus is found in the main plant body of Equisetum.
(d) Antheridia are absent but archegonia are present in female storobil of gymnosperms.
Choose the correct option.
1. All of these 2. (a), (c) and (d)
3. Only (a) 4. (b) and (c)
Which one is correct about male and female gametophyte?
1. | In bryophytes and pteridophytes, they have no independent free-living existence. |
2. | In bryophytes and angiosperms, they have free-living existence. |
3. | In gymnosperms and angiosperms, they have no independent free-living existence. |
4. | In bryophytes, pteridophytes and angiosperms, they have free-living existence. |
Which of the following is/are correct for gymnosperms?
(i) They are heterosporous.
(ii) They are the first vascular plants.
(iii) They possess fruits.
(iv) They require water for fertilisation.
1. Only (i)
2. (i) and (ii)
3. (ii) and (iii)
4. (i), (ii), (iii) and (iv)
In gymnosperms, the pollen chamber represents
1. A cavity in the ovule in which pollen grains are stored after pollination.
2. An opening in the megagametophyte through which the pollen tube approaches the egg.
3. The microsporangium in which pollen grains develop.
4. A cell in the pollen grain in which the sperms are formed.
The spreading of living pteridophyte is limited and is restricted to narrow geographical region because of
1. Growth requirements of gametophyte (cool, damp and shady places).
2. Requirement of water for fertilisation.
3. Absence of stomata in leaf and absence of vascular tissue.
4. Both 1. and 2..
Artificial systems gave equal weightage to
1. Morphological and anatomical characters.
2. Vegetative and sexual characters.
3. Vegetative and anatomical characters.
4. Morphological and sexual characters.
According to phylogenetic classification organisms belonging to same taxa
1. Are same in anatomy.
2. Have same genetic constituent.
3. Have a common ancestor.
4. Have all characteristics same.
Choose the correct statement.
1. Many species of Porphyra, Laminaria and Sargassum and among 70 species of marine algae used as food.
2. Agar is used to grow microbes and in preparations of ice creams and jellies.
3. Algae are useful to man in a variety of ways.
4. All of these.
Cell wall of green algae is made up of
1. Inner layer of chitin and outer layer of pectose.
2. Inner layer of cutin and outer layer of pectin.
3. Inner layer of pectose and outer layer of cellulose.
4. Inner layers of cellulose and outer layer of pectose.
Out of the following four statements, how many of them are correct for Fucus?
I. Life – cycle is diplontic.
II. Fertilisation is internal.
III. Sexual reproduction is oogamous.
IV. Frond is photosynthetic.
1. 4
2. 3
3. 2
4. 1
Which of the following is not an example of algae in which there is post – fertilization development process?
1. Laminaria
2. Porphyra
3. Polysiphonia
4. Batrachospermum
Fresh water form is rare in which algal group
1. Red Algae
2. Brown algae
3. Green Algae
4. Both 1. and 2.
Which of the following is not matched correctly?
1. | Artificial system of classification – Equal weightage to vegetative and sexual character. |
2. | Natural system of classification – Based on natural affinities. |
3. | Phylogenetic system – Common ancestor for unrelated taxa. |
4. | Numerical taxonomy – Equal importance to all character. |
Which of the following character is common for all algal group.
1. Presence of cellulose in cell – wall.
2. Starch is reserve food material.
3. Presence of motile stage.
4. Only oogamous type of sexual reproduction.
Study the diagram given below, and find out how many of the statements given below is related to this diagram.
I. It is source of food.
II. Its wall has poly sulphated esters.
III. Its reserve food is similar to glycogen in structure.
IV. There is no motile stage in its life – cycle.
1. 1
2. 2
3. 3
4. 4
Pyrenoids in green algae is located in?
1. Cytoplasm
2. Chloroplast
3. Vacuole
4. Flagella
Following diagram represents a class of algae.
Find out odd statements related to this class of algae.
1. In protoplast a centrally located vacuole is present.
2. Body color depends upon concentration of fucoxanthin.
3. Pyriform zoospore with laterally inserted unequal flagella.
4. Food is stored in form of simple carbohydrates.
Along with Lichens which group of plant play important role when succession takes place on rock.
1. Algae
2. Bryophytes
3. Pteridophytes
4. Angiosperm
Study the diagram given below and mark the correct statement.
1. Part A is dependent on part B.
2. Part B is dependent on part A.
3. Both parts are independent
4. Part A is haploid whereas part B is diploid