Which antibiotic inhibits the interaction between t-RNA and m-RNA using bacterial protein synthesis?

1. Erythromycin

2. Neomycin

3. Streptomycin

4. Tetracycline

Phenotype of an organism is the result of:

1. mutations and linkages

2. cytoplasmic effects and nutrition

3. environmental changes and sexual dimorpgism

4. genotype and environment interactions

Photochemical smog pollution does not contain:

1. ozone

2. nitrogen dioxide

3. carbon dioxide

4. PAN (Peroxy Acyl Nitrate)

Moss peat is used as a packing material for sending flowers and live plants to distant places because:

1. it is easily available

2. it is hygroscopic

3. it reduces transpiration

4. it serves as a disinfectant

A common structural feature of vessel elements and sieve tube elements is:

1. thick secondary walls

2. pores on lateral walls

3. presence of P-protein

4. enucleate condition

The thalloid body of a slime mould (Myxomycetes) is known as:
1. protonema
2. Plasmodium
3. fruiting body
4. mycelium

In which mode of inheritance do you expect more maternal influence among the offspring?

1. Autosomal

2. Cytoplasmic

3. Y-linked 

4. X-linked

What type of placentation is seen in sweet pea?

1. Basal

2. Axile

3. Free-central

4. Marginal

Long filamentous threads protruding at the end of a young cob of maize are:

Conifers differ from grasses in the:

1. production of seeds from ovules

2. lack of xylem tracheids

3. absence of pollen tubes

4. formation of endosperm before fertilization