Which one of the following term is correctly matched with their definition in Pinus ?
Monoecious Male (microsporangiate) and female (megasporangiate) cones are produced on same plant.
Monoecious Male and female sporophylls borne on same strobilus.
Dioecious Male and female cones are produced on different plants.
Monoecious Micro and megasporocarp develop on same plant.
Correct Answer :
A. Monoecious Male (microsporangiate) and female (megasporangiate) cones are produced on same plant.
Monoecious is a plant species in which male (microsporangiate) and female (megasporangiate) organs are found on the same plant but in different flowers (for example maize). Dioecious plant is a plant species in which male and female organs appear on separate individuals.
Related Questions
Cytological information like chromosome number, structure, behaviour are related with
numerical taxonomy
cytotaxonomy
chemotaxonomy
all of the above
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
Bryophytes are different from fungi in having
land habit.
sterile jacket layers.
multiflagellate gametes.
gametophytic plant body.
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
Which of the following group of plant is being described by the given statements ?
(i) They are plants in which the ovules are not enclosed by any ovary wall and remain exposed before and after fertilization.
(ii) The giant red wood tree Sequoia is one of the tallest tree species of the group.
(iii) The roots are generally tap roots.
(iv) They are heterosporous and they produce haploid microspores and megaspores.
Algae
Bryophytes
Gymnosperms
Pteridophytes
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
Cycas and Adiantum resemble each other in having
seeds
motile sperms
cambium
vessels
Fusion of two gametes which are dissimilar in size is termed as _______.
isogamous
oogamous
anisogamous
agamous
Laminaria (Kelp) and Fucus (Rock weed) are examples of
green algae
brown algae
red algae
golden brown algae
Which of the following statement(s) is/are correct about pteridophytes ?
(i) The main plant body is a sporophyte which is differentiated into true roots and leaves.
(ii) The leaves are small (microphylls) as in ferns or large (macrophylls) as in Selaginella.
(iii) Genera like Selaginella and Salvinia which produce two kinds of sporesmacro (large) and micro (small) spores, are known as heterospores.
(iv) Common examples are Funaria, Polytrichum and Sphagnum.
Both (i) and (ii)
Both (ii) and (iii)
Both (i) and (iii)
All of these
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 one of the following statement concerning the algae is incorrect ?
Most algae are photosynthetic.
Algae can be classified according to their pigments.
All algae are filamentous.
Spirogyra does not produce zoospores.
The Natural system of classification for flowering plants was given by
Carolus Linnaeus
Bentham and Hooker
Engler and Prantl
R. H. Whittaker
A bryophyte differs from pteridophytes in having
archegonia.
lack of vascular tissue.
swimming antherozoids.
independent gametophytes.
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
Statement 1: Double fertilization is a characteristic feature of angiosperms.
Statement 2: Double fertilization involves two fusions.
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.
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.
Protonema and leafy stage are the predominant stage of the life cycle of
moss
dicots
liverwort
gymnosperm
Refer the following statement(s) and identify the group of plant which is being described by given statements ?
(i) They include various mosses and liverworts that are found commonly growing in moist shaded areas in the hills.
(ii) They lack true roots, stem or leaves.
(iii) The main plant body is haploid.
(iv) They produce a multicellular body sporophyte which is not free living but attached to the photosynthetic gametophyte and derives nourishment from it.
Algae
Fungi
Bryophytes
Pteridophytes
Which of the following statement(s) is/are correct ?
In angiosperms, each embryo sac has a three-celled egg apparatus one egg cell and two synergids, three antipodal cells and two polar nuclei.
All seed bearing plants i.e., gymnosperms and angiosperms follow dipontic life patterns of plants.
In gymosperms, roots in some genera have fungal association in the form of mycorrhiza (Pinus) while in some others (Cycas) small specialized roots called coralloid are associated with N2 fixing cyanobacteria.
All of the above
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
The unique feature of bryophytes compared to other plant groups is that
they produce spores.
they lack vascular tissues.
they lack roots.
their sporophyte is attached to the gametophyte.
Fern plant is a
haploid gametophyte
diploid gametophyte
diploid sporophyte
haploid sporophyte
Which of the following pair is incorrectly matched ?
Chlorophyceae Major pigments are chl a and b.
Phaeophyceae Cell wall is made up of cellulose and algin.
Rhodophyceae Stored food is mannitol.
Chlorophyceae Cell wall is made up of cellulose.
Which of the following class of algae is rarely found in fresh water ?
Chlorophyceae
Phaeophyceae
Rhodophyceae
Both (a) and (b)
Which of the following statement is incorrect ?
Double fertilization is unique to gymnosperms and monocotyledons.
Sequoia, a gymnosperm, is one of the tallest tree species.
Phaeophyceae members possess chlorophyll a, c, carotenoids and xanthophylls.
Moss is a gametophyte which consists of two stages namely, protonemal stage and leafy stage.
Refer the statement and answer the question. They usually reproduce vegetatively by fragmentation and asexually by non - motile spores and sexually by non - motile gametes.
Identify the group of plants and its example.
Mosses, Funaria
Red algae, Polysiphonia
Brown algae, Laminaria
Pteridophytes, Selaginella
Chemotaxonomy is connected with
classification of chemicals found in plants.
use of phytochemical data in systematic botany.
application of chemicals on herbarium sheets.
use of statistical methods in chemical yielding plants.
Match column-I with column-II and choose the correct option.
| Column-I | Column-II |
|---|---|
| A. Amphibian of the | I. Sphagnum plant kingdom |
| B. Specialized structures | II. Angiosperms in liverworts for asexual reproduction |
| C. Monocotyledons and | III. Bryophytes dicotyledons |
| D. A plant which has | IV. Gemmae capacity to holding water |
A III; B IV; C I; D II
A III; B IV; C II; D I
A IV; B III; C II; D I
A III; B II; C IV; D I
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