Rarely among angiosperms the pollen grains influenced the endosperm. This is called as :

• Metaxenia

• Nemec phenomenon

• Xenia

• Mesogamy

Teeth of rabbits are :

• thecodont

• diphyodont

• heterodont

• all of these

Which of the following taxonomist described classification of plant kingdom in "Families of flowering plants" ?

• Cronquist

• Takhtajan

• Benson

• Hutchinson

Sudoriferous glands occur in :

• lung

• kidney

• skin

• alimentary canal

Defect in amino acid metabolism may results in :

• albinism

• porphyria

• Wilson's disease

• phenylketonuria

In the sporogonium of which plant, columella is present ?

• Penicillium

• Spirogyra

• Rhizopus

• Ulothrix

Which of the following does not match ?

• Muscular movement - ATP

• Heart - pace maker

• Monocyte - haemoglobin

• Nerve impulse - acetylcholine

Growth rings are formed due to activity of :

• extrastelar cambium

• intrastelar cambium

• interstelar cambium

• both 'b' and 'c'

A protein rich green alga is :

• Chlorella

• Spirulina

• Spirogyra

• Ulothrix

Largest number of chloroplast is found in :

• palisade tissue

• spongy tissue

• transfusion tissue

• bundle sheath cells