The primitive prokaryotes responsible for the production of biogas from the dung of ruminant animals, include the

(1) thermoacidophiles

(2) methanogens

(3) eubacteria

(4) halophiles

One of the major components of cell wall of most fungi is

(1) peptidoglycan

(2) cellulose

(3) hemicellulose

(4) chitin

Which of the following statements is wrong for viroids?

(1) They are smaller than viruses

(2) They cause infections

(3) Their RNA is of high molecular weight

(4) They lack a protein coat

Which one is a wrong statement?

(1) Archegonia are found in Bryophyta, Pteridophyta and Gymnosperms.

(2) Mucor has biflagellate zoospores.

(3) Haploid endosperm is typical feature of gymnosperm.

(4) Brown algae have chlorophyll-a and c, and fucoxanthin.

Keel is the characteristic feature of flower of

(1) tulip

(2) Indigofera

(3) Aloe

(4) tomato

Which one of the following fungi contains hallucinogens?

(1) Morchella esculenta

(2) Amanita muscaria

(3) Neurospora sp.

(4) Ustilago sp.

Archaebacteria differ from eubacteria in

(1) cell membrane structure

(2) mode of nutrition

(3) cell shape

(4) mode of reproduction

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

The most abundant prokaryotes helpful to human in making curd from milk and in production of antibiotics are the ones categorized as

1. cyanobacteria

2. archaebacteria

3. chemosynthetic autotrophs

4. heterotrophic bacteria

Which one of the following does not differ in E.coli and Chlamydomonas?

(1) Ribosomes

(2) Chromosomal organization

(3) Cell wall

(4) Cell membrane