31.

Which one of the followings is the functional unit of hearing?

• Utricle

• Organ of Zuckerkandl

• Organ of Corti

• Vestibular apparatus

Which one of the followings is not a refractive medium of the eye?

• Lens

• Vitreous humour

• Aqueous humour

• Pupil

The heart is covered by

• epicardium

• pericardium

• supracardium

• endocardium

Vernalisation promotes flowering by

• low temperature

• high temperature

• prolonged photoperiod

• short photoperiod

C₄ pathway is advantageous over C₃ pathway in plants as it

• occurs in relatively low CO₂ concentration

• uses more amount of water

• occurs in relatively low O₂ concentration

• is less efficient in energy utilisation

TCA cycle enzymes are located in

• cristae

• outer membrane

• mitochondrial matrix

• mitochondrial intermembrane space

Which one of the following statements is incorrect?

• Insects have one pair of antenna

• Millipeds possess two pairs of appendages in each segment of the body

• Prawns have two pairs of antenna

• Animals belonging to the phylum- Porifera have nematocys

Which one of the followings is not a characteristic feature of mammals?

• Diphyodont tooth

• Ten pairs of cranial nerves

• Seven cervical vertebrae

• Left aortic arch in the circulatory system

The eukaryotic cells have all of the followings except

• peptidoglycan in the cell wall

• the 80 S ribosome

• nuclear membrane

• mitochondria

Which of the followings does not occur in the interphase of eukaryotic cell division?

• Increase of ATP synthesis

• Increase of DNA synthesis

• Increase of RNA synthesis

• Reduction in cell size