Cleavage polyembryony occurs in

• Pinus

• Mini Cycas

• Cycas

• Ephedra

Streptomycin is obtained from

• Streptomyces griseus

• S. aureofaciens

• S. venezuelae

• S. ramosus

DNA element with ability to change position is called

• cistron

• transposon

• intron

• recon

Initiation codon is

• UUU

• UGA

• AUG

• UAG

DNA mutiplication is called

• translation

• replication

• transduction

• transcription

Which is always present in photochemical smog?

• O₃

• CO₂

• SO₂

• CH₄

The soil which is transported by wind is known as

• colluvial

• eolian

• aluvial

• glacial soil

Lichen is the pioneer vegetation on which succession?

• Hydrosere

• Lithosere

• Psammosere

• Xerosere

In Pinus, male cone bears a large number of

• ligules

• anthers

• micro- sporophylls

• mega- sporophylls

Decomposers are

• autotrophs

• autoheterotrophs

• organotrophs

• heterotrophs