Identify the labels ' X ', ${ }^{\prime} \mathrm{Y}^{\prime}$ and ' Z ' in following figure.

X - Styles, Y - Prop roots, Z - Tassel
X - Prop roots, Y - Styles, Z - Tassel
X - Prop roots, Y - Tassel, Z - Styles
X - Tassel, Y - Prop roots, Z - Styles
Which of the following statements are correct regarding chromosomal basis of sex determination?
i. The mechanism of sex determination in insect is XX - XO type.
ii. In honey-bee, haplo-diploid type of sex determination is observed.
iii. Human males have homomorphic sex chromosomes.
iv. Human females have heteromorphic sex chromosomes.
v. Chromosomal mechanism of sex determination in birds is ZW-ZZ type.
i, ii and v only
iii and iv only
i, ii and iv only
ii, iv and v only
Which of the following is INCORRECT in case of severe haemorrhage?
Osmoreceptors in hypothalamus stimulate ADH secretion.
ADH stimulates reabsorption of water from last part of DCT and entire collecting duct.
Urine volume increases.
Osmolarity of blood decreases.
Select the INCORRECT statements.
i. The rate of formation of $\mathrm{H}_2 \mathrm{CO}_3$ is slower in RBCs and faster in plasma.
ii. Dissociation of $\mathrm{H}_2 \mathrm{CO}_3$ into $\mathrm{H}^{+}$and $\mathrm{HCO}_3^{-}$ takes place due to carbonic anhydrase.
iii. The carbonic anhydrase is present in leucocytes,
iv. The prosthetic group of carbonic anhydrase is Mn .
Select the correct option.
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