51.

Which of the following is ideal for studying meiosis?

• Gamete

• Pollen

• Microsporangium

• Root

To which of the following flower 'synandrous' condition is found?

• Sunflower (Helianthus sp)

• Gourd (Cucurbita sp)

• Pea (Pisum sativum)

• Lemon (Citrus sp)

Study of pollen grain is called

• Ethmology

• Palynology

• Palaeobotany

• $\mathrm{\omega }$-taxonomy

Which one of the following conditions in chromosome number is called monosomy?

• 2n + 1

• 2n + 2

• 2n - 1

• 2n - 2

Shorter generation time of E. coli compared to eukaryotes may be explained on the basis of

• shape

• large surface : volume ratio

• presence of cell wall

• absence of organelles

Division in a bacterial cell is carried out through

• multiple fission

• binary fission

• budding

• plasmotomy

Which one of the following bacterium is used extensively as biopesticide?

• Bacillus subtilis

• Bacillus thuringiensis

• Streptococcus lactis

• Lactobacillus acidophilus

Which one among the following is just a cloning plasmid not an expression plasmid?

• pBAD-18-Cam

• pBCSK

• pUC18

• pET

'Royal jelly' is secreted from

• hypopharyngeal gland

• salivary gland

• milk gland

• integumentary gland

Liver damage caused by excessive drinking of alcohol is called

• hepatitis

• dematitis

• liver cirrhosis

• liver diarrhoea