NEET-UG 2023 · Code E1

Given below are two statements : One is labelled as Assertion A and the other is labelled as Reason R : Assertion A : The first stage of gametophyte in the life cycle of moss is protonema stage. Reason R : Protonema develops directly from spores produced in capsule. In the light of the above statements, choose the most appropriate answer from the options given below :

1. ABoth A and R are correct and R is the correct explanation of A.
2. BBoth A and R are correct but R is NOT the correct explanation of A.
3. CA is correct but R is not correct.
4. DA is not correct but R is correct.

In angiosperm, the haploid, diploid and triploid structures of a fertilized embryo sac sequentially are :

1. ASynergids, Primary endosperm nucleus and zygote
2. BAntipodals, synergids, and primary endosperm nucleus
3. CSynergids, Zygote and Primary endosperm nucleus
4. DSynergids, antipodals and Polar nuclei

Movement and accumulation of ions across a membrane against their concentration gradient can be explained by

1. AOsmosis
2. BFacilitated Diffusion
3. CPassive Transport
4. DActive Transport

Large, colourful, fragrant flowers with nectar are seen in :

1. Ainsect pollinated plants
2. Bbird pollinated plants
3. Cbat pollinated plants
4. Dwind pollinated plants

The phenomenon of pleiotropism refers to

1. Apresence of several alleles of a single gene controlling a single crossover.
2. Bpresence of two alleles, each of the two genes controlling a single trait.
3. Ca single gene affecting multiple phenotypic expression.
4. Dmore than two genes affecting a single character.

Which hormone promotes internode/petiole elongation in deep water rice?

1. AGA₃
2. BKinetin
3. CEthylene
4. D2, 4-D

Among ‘The Evil Quartet’, which one is considered the most important cause driving extinction of species?

1. AHabitat loss and fragmentation
2. BOver exploitation for economic gain
3. CAlien species invasions
4. DCo-extinctions

Upon exposure to UV radiation, DNA stained with ethidium bromide will show

1. ABright red colour
2. BBright blue colour
3. CBright yellow colour
4. DBright orange colour