How many of the following statements are correct?
1. Conjoint vascular bundles are not present in monocot stem.
2. Casparian strips of endodermis are made of cutin.
3. Pith is large and well developed in monocot roots.
4. Trichome helps in water loss due to transpiration.

Which of the following statement(s) is/are correct? I. Radial vascular bundles are commonly found in stems. II. Conjoint vascular bundles are found in roots. III. Radial vascular bundles are commonly found in roots. IV. Conjoint vascular bundles are found in stems and leaves. 1 II and III 2 I, II and III 3 III and IV 4 I and II

How many of the following statements are correct? i) In cyclobutadiene two unpaired pi electrons are Present in pi nonbonding molecular orbitals which are responsible for destabilization of cyclobutadiene. ii) Cyclopentadiene pKa value is less than that of cycloheptatriene iii) Dipole moment of I^(st) Structure is more than II^(nd) Structure in the following iv) Cycloheptatrienyl bromide is less soluble in H_(2)O than in non-polar solvent v) Due to anti aromatic nature [4]-annulene is less stable than [6]-annulene

In the following questions , a statement of assertion (A) is followed by a statement of reason (R). A: Epidermal hairs on the stem are called trichomes R: They help in absorption of water loss due to transpiration,

Conjoint , collateral vascular bundles are found in :- (1) Stems (2) Leaves (3) Roots (4) Both (1) & (2)

Which of the following statement are correct ? (1) alpha - amino acids present in protein are alpha - L amino acids 2. Amino acids present -NH_2 as well as - COOH group 3. Number of amino groups and crboxylic groups are always same in all alpha - amino acids (4) Concentration of dipolar ion is maximum at isoeletric point Select the correct answer from the codes given below

How many of the following statements are correct? 1) The most stable conformer of cis-1, 3-cyclohexanediol is chair form. 2) Cis- 1, 3- cyclohexanediol is more stable than trans -1, 3-cyclohexanediol. 3) In Cis 1, 3-cyclohexanediol both the OH groups occupy equitorial positions. 4) The most stable conformer of trans -1, 4-cyclohexanediol is chair form. 5) The most stable conformer of cis-1, 4-cyclohexanediol is boat conformer.

How many of the following statements are correct ? 1. Good ozone is found in the stratosphere. 2. UV radiation having a lower wavelength than UV -B is almost completely absorbed by the Earth's atmosphere. 3. UV - B causes snow blindness and cataract. 4. dB is a unit to measure the thickness of ozone.