21.

Nodules with nitrogen-fixing bacteria are found in

• cotton

• gram

• mustard

• wheat

Major protein of connective tissue is

• myosin

• collagen

• melanin

• keratin

Desert can be converted into green land by planting

• oxylophytes

• psammophytes

• halophytes

• trees

Powdery mildew of crops are caused by

• bacteria

• Ascomycetes

• Basidiomycetes

• Phycomycetes

Blackman's law of limiting factor is applied to

• respiration

• transpiration

• photorespiration

• photosynthesis

Funaria gametophyte is

• dioecious

• heteroecious

• autoecious

• monoecious and autoecious

The usage of binomial names, for plant species was accepted by all after the publication of the work by

• Hooker

• Linnaeus

• Bentham

• Darwin

A prokaryotic cell lacks

• true nucleus

• nuclear membrane

• membrane bound organelles

• All of the above

Induction of cell division and delay in senescence is done by

• cytokinins

• auxins

• GA

• Co-A

In which kingdom, would you classify the archaea and nitrogen-fixing organisms. If the five-kingdom system of classification is used?

• Protista

• Monera

• Plantae

• Fungi