Statement I - Virus free plant can be produced from virus infected plant by means of meristem culture.
Statement II - Virus fails to grow during the growth of host tissues in the artificial medium.
Statement I is correct, but Statement II is incorrect
Statement II is correct, but Statement I is incorrect.
Both Statement are correct
Both statements are incorrect
C.
Both Statement are correct
Virus free plants can be grown by means of meristem culture. The reason for the escape of the meristem from virus invasion are
(i) Viruses readily move in a plant body through the vascular system which is absent in the meristem.
(ii) High metabolic activity in the actively dividing meristem cells does not allow virus replication.
Microbes such as virus may be present in the medium from beginning or with cultural tissue. So, instruments as well as explants are sterilised before culture.
The marine organism showing spinning movements and responsible for killing fishes by producing toxins belong to the following kingdom in Whittaker's classification.
Monera
Protista
Fungi
Animalia
The name of this class is based on sexual structure as the site of karyogamy and meiosis in
Phycomyctes and Actinomycetes
Deuteromycetes and Zygomycetes
Ascomycetes and Basidiomycetes
Basidiomycetes and Actinomycetes
In biosystematics, the basis of classification is
major morphological characters
cytological characters
evolutionary history considering various parameters from different fields of studies
phenotypic relationships between species
Study the following Columns
| Column I | Column II |
| A. Takhtajan | 1. Five Kingdom classification |
| B. Linnaeus | 2. Phylogenetic classification |
| C. Warming | 3. Artificial classification |
| D. Carl Woese |
4. Classification of communities based on relation of water 5. Six kingdom classification |
The correct match is
A - 2; B - 3; C - 4; D - 5
A - 4; B - 1; C - 5; D - 3
A - 5; B - 2; C - 1; D -4
A - 5; B - 4; C - 2; D -3
Consider the following statements about basis of classification.
I. Amphibians are classified on the basis of their habitat.
II. Reptiles are classified on the basis of the nature of their skulls.
III. Birds are classified on the basis of their bones.
IV. Mammals are classified on the basis of their mode of reproduction.
Choose the correct option
Only I
I and II
Only II
II and IV
Study the following Columns.
| Column I | Column II |
| A. Solitary cyme | 1. Solanum |
| B. Monochasical cyme | 2. Ipomea |
| C. Cymule | 3. Datura |
| D. Polychasial cyme |
4. Jasmine 5. Nerium |
The correct match is
A - 3; B - 4; C - 5; D - 2
A - 3; B - 1; C - 4; D - 5
A - 1; B - 3; C - 5; D - 4
A - 3; B - 1; C - 5; D - 2
