Which of the following taxonomic categories contains organisms least similar to one another?

1. Class

2. Genus

3. Family

4. Species

The label of a herbarium sheet does not carry information on

(1) date of collection

(2) name of collector

(3) local names

(4) height of the plant

Match column I with column II for housefly classification and select the correct option using the codes given below:

Codes:

         A     B     C     D

(1)     3     1      4     2

(2)     3     2      4     1

(3)     4     3      2     1

(4)     4     2      1     3

Study the four statements (I-IV) given below and select the two correct ones out of them:

I. Definition of biological species was given by Ernst Mayr.

II. Photoperiod does not affect reproduction in plants.

III. Binomial nomenclature system was given by RH Whittaker.

IV. In unicellular organisms, reproduction is synonymous with growth.

The two correct statements are

(1) II and III

(2) III and IV

(3) I and IV

(4) I and II

The living organisms can be unexceptionally distinguished from the non-living things on the basis of their ability for:

(1) responsiveness to touch

(2) interaction with the environment and progressive evolution

(3) reproduction

(4) growth and movement

Biological organisation starts with

(1) Submicroscopic molecular level

(2) Cellular level

(3) Organismic level

(4) Atomic level

ICBN stands for:

(1) Indian Congress of Biological Names

(2) International Code for Botanical Nomenclature

(3) International Congress of Biological Names

(4) Indian Code of Botanical Nomenclature

Evolutionary history of an organism is known as :

(1) Phylogeny

(2) Ancestry

(3) Paleontology

(4) Ontogeny

Which one of the following is not a correct statement?

1. Herbarium houses dried, pressed and preserved plant specimens

2. Botanical gardens have collection of living plants for reference

3. A museum has collection of photographs of plants and animals

4. Key is a taxonomic aid for identification of specimens

Two plants can be conclusively said to belong to the same species if they:

(1) can reproduce freely with each other and form viable seeds

(2) have more than 90 percent similar genes

(3) look similar and possess identical secondary metabolites

(4) have same number of chromosomes