Which one of the following is the major difference between mosses and ferns ?
Ferns lack alternation of generation while mosses show the same.
Mosses are facultative aerobes while ferns are obligate aerobes.
Vascular bundles of ferns show xylem vessels while those of mosses lack it.
Sporophytes of ferns live much longer as compared to the sporophytes of mosses.
Correct Answer :
D. Sporophytes of ferns live much longer as compared to the sporophytes of mosses.
In bryophytes, the dominant phase in the life cycle is the gametophytic plant body. However, in pteridophytes, the main plant body is a sporophyte. Which is differentiated into true root, stem and leaves. These organs possess well differentiated vascular tissues.
Related Questions
In order to colonize land, plants needed to acquire which of the following characteristics?
A mechanism for moving water throughout the plant.
A mechanism to prevent desiccation of tissues.
An ability to screen ultraviolet radiation.
Both (b) and (c)
Statement 1: Members of phaeophyceae vary in colour from olive green to various shades of brown.
Statement 2: Phaeophyceae possess chlorophyll a, c, carotenoids and xanthophylls.
Both statements -1 and statement - 2 are true and statement - 2 is the correct explanation of statement - 1.
Both statements -1 and statement - 2 are true but statement - 2 is not the correct explanation of statement - 1.
Statement -1 is true and statement - 2 is false.
Statement -1 is false and statement - 2 is true.
Which one of the following is a correct statement?
Pteridophyte gametophyte has a protonemal and leafy stage.
In gymnosperms, female gametophyte is free-living.
Antheridiophores and archegoniophores are present in pteridophytes.
Origin of seed habit can be traced in pteridophytes.
Deep in the tropical rain forest, a botanist discovered an unusual plant with vascular tissues, stomata, a cuticle, flagellated sperm, conelike reproductive structures bearing seeds, and an alternation-of-generations life cycle. He was very excited about this discovery because it would be rather unusual for a plant to have both
a cuticle and flagellated sperm.
vascular tissues and alternation of generations.
seeds and flagellated sperm.
alternation of generations and seeds.
A research student collected certain alga and found that its cells contained both chlorophyll a and chlorophyll d as well as phycoerythrin on the basis of his observation the students conclude that the alga belongs to
rhodophyceae
bacillariophyceae
chlorophyceae
phaeophyceae
Which of the following statement(s) is/are correct?
(i) Green algae are the members of chlorophyceae.
(ii) Brown algae are found primarily in marine habitates
(iii) Some red algae are found in fresh water, mostly occur in salt water, some are in brackish water.
(iv) The food in red algae is stosed as floridean starch.
(v) Red alga may occur in both well-lighted regions close to water-surface and also at great depths in oceans where light penetration is little.
(i) and (v) only
(ii), (iii) and (iv) only
All of the above
None of the above
What is the number and position of insertions of flagella in rhodopyceae class of algae ?
2 - 8, equal, apical
2, unequal, lateral
2 - 6, equal, lateral
Absent
Match the classes of pteridophytes given in column I with their examples given in column II and choose the correct option
| Column -I | Column-II |
|---|---|
| (Classes of pteridophytes) | (Examples) |
| A. Psilopsida | I. Selaginella |
| B. Lycopsida | II. Psilotum |
| C. Sphenopsida | III. Dryopteris |
| D. Pteropsida | IV. Equisetum |
A II; B I; C IV; D III
A I; B II; C IV; D III
A II; B I; C III; D IV
A II; B IV; C I; D III
Mosses do not have true leaves because their leaf-like structures lack
starch in their chloroplast.
vascular tissues.
chlorophyll.
cellulose in their cell walls.
Pyrenoids in green algal cells are related to
starch formation
protein storage
general metabolism
enzyme secretion
Which of the following statements with respect to gymnosperms and angiosperms is/are correct?
(i) The process of double fertilization is present in gymnosperms.
(ii) Angiosperms range in size from microscopic Wolffia to tall trees of Sequoia.
(iii) In gymnosperms, the seeds are not covered.
(iv) In gymnosperms, the male and female gametophytes have an independent free living existence. Of the above statements
(i) and (ii)
(iii) only
(ii) and (iii)
(iii) and (iv)
Algin, carrageen and proteins are obtained from
red algae, brown algae, green algae respectively.
brown algae, red algae, green algae respectively.
red algae, green algae, brown algae respectively.
green algae, brown algae, red algae respectively.
Which of the following branch of science is being described by the given statements ?
(i) It can easily done by using computers based on all observable characters.
(ii) Numbers and codes are assigned to all the characters and the data are then processed.
(iii) Each character is given equal weightage and at the same time hundred of characters can be considered.
Cytotaxonomy
Numerical taxonomy
Chemotaxonomy
??-taxonomy
Phylogenetic classification system is based on the
morphological characters of various organisms.
anatomical characters of various organisms.
physiological characters of various organisms.
evolutionary relationships between the various organisms.
Cycas and Adiantum resemble each other in having
seeds
motile sperms
cambium
vessels
Which of the following pteridophytes belong to class pteropsida?
Equisetum and Psilotum
Lycopodium and Adiantum
Selaginella and Pteris
Pteris and Adiantum
Which of the following statements are incorrect?
Pyrenoids contain protein besides starch.
Sexual reproduction may be isogamous, oogamous and anisogamous in green and brown algae.
Some of the members of algae also occur in association with fungi (lichen) and animals (eg, on sloth bear).
The leaves in pteridophytes are well adapted to withstand extremes of temperature, humidity and wind.
Laminaria (Kelp) and Fucus (Rock weed) are examples of
green algae
brown algae
red algae
golden brown algae
If the cells of root in wheat plant have 42 chromosomes, then the no. of chromosome in the cell of pollen grain is
14
21
28
42
Angiosperms have dominated the land flora primarily because of their
power of adaptability in diverse habitat.
property of producing large number of seeds.
nature of self pollination.
domestication of man.
If there are 4 cells in anther, what will be the number of pollen grains?
8
4
16
12
A student was given a sample to observe under the microscope. He observed and found that the sample is the most common type of spore involved in asexual reproduction in algae. Identify the spore.
Zoospore
Endospore
Hypnospore
None of the above
What is the similarity between gymnosperms and angiosperms?
Phloem of both have companian cells.
Endosperm is formed before fertilization in both.
Origin of ovule and seed is similar in both.
Both have leaves, stem and roots.
Which of the following statement(s) is/are correct about angiosperms ?
(i) In angiosperms or flowering plants, the pollen grains and ovules are developed in specialised structure called flowers.
(ii) They are divided into two classes : the dicotyledons and the monocotyledons.
(iii) The male sex organ in a flower is the pistil or the carpel.
(iv) The female sex organ is the stamen.
Only (i)
Both (i) and (ii)
Both (ii) and (iv)
All of these
A universal feature of the life cycle of plants is
morphologically identical haploid and diploid stages.
genetically identical haploid and diploid stages.
alteration of generations between heteromorphic haploid gametophytes and diploid sporophytes.
none of the above
Why rhodophyta exhibit a red colour ?
Since most rhodophyta grow at great depths, the chlorophyll can only absorb light in the red area of the spectrum.
The wavelengths of light that are absorbed by chlorophyll are passed to phycoerythrin (a red pigment).
Red pigment of rhodophyta absorbs all the light waves.
The light reaching the greatest depth in water is in the blue-green region of the spectrum, is absorbed by phycoerythrin.
Protonema and leafy stage are the predominant stage of the life cycle of
moss
dicots
liverwort
gymnosperm
Read the following statements and answer the question.
(i) Sporophytic generation is represented only by the one-celled zygote.
(ii) Meiosis in the zygote results in the formation of haploid spores.
(iii) The dominant, photosynthetic phase in such plants is free-living gametophyte.
(iv) Many algae such as Volvox, Spirogyra and some species of Chlamydomonas represent this pattern.
Which of the following pattern of life cycle of plant is described by the above statements ?
Haplontic
Diplontic
Haplo-diplontic
None of these
Match the column-I with column-II and choose the correct option.
| Column-I | Column-II |
|---|---|
| (System of classification) | (Characteristics) |
| A. Artificial system | I. Based on few morphological of classification characters |
| B. Natural system | II. Based on evolutionary of classification relationships between the various organisms |
| C. Phylogenetic | III. Based on natural affinities system of among the organisms and classification consider external as well as internal features. |
A II; B I; C III
A I; B III; C II
A III; B II; C I
A I; B II; C III
Moss peat is used as a packing material for sending flowers and live plants to distant places because
it reduces transpiration.
it serves as a disinfectant.
it is easily available.
it is hygroscopic.