NEET TEST SERIES 114 BIOLOGY

1. Assertion (A): If pollen mother cells have 42 chromosomes, the pollen has only 21 chromosomes.
    Reason (R): Pollens are formed after meiosis from pollen mother cell.

(a) Both (A) and (R) are correct but (R) is not the correct explanation of (A)
(b) (A) is correct but (R) is not correct
(c) (A) is not correct but (R) is correct
(d) Both (A) and (R) are correct and (R) is the correct explanation of (A)

2. Identify the kind of phyllotaxy shown in the given figures A, B, and C.
 

(a) A-Alternate, B – Opposite, C – Whorled
(b) A- Whorled, B – Opposite, C -Alternate
(c) A-Allemate, B – Whorled, C – Opposite
(d) A-Whorled, B-Alternate, C-Opposite

3. Assertion (A): Viruses are not considered as organism.
      Reason (R):  Viruses are nucleoproteins and lack cell organelle.

(a) Both (A) and (R) are correct but (R) is not the correct explanation of (A)
(b) (A) is correct but (R) is not correct
(c) (A) is not correct but (R) is correct
(d) Both (A) and (R) are correct and (R) is the correct explanation of (A)

4. The practical purpose of classification of living organisms is to:

(a) explain the origin of living organsims.
(b) trace the evolution of living organsims.
(c) name the living organisms.
(d) facilitate grouping of anything based on some easily observable characteristics.

5. Which of the following statement (s) is/are not correct?
(i) Calyx and corolla are reproductive organs of a flower.
(ii) Zygomorphic flower can be divided into two equal radial halves in any radial plane.
(iii) Flowers without bracts are termed as bracteate.
(iv) Parthenocarpic fruit is formed after fertilization of the ovary.
(v) In legumes, seed is non-endospermic.

(a) (i), (ii), (iii) and (iv)   
(b) (i), (ii) and (v)
(c) (iii), (iv) and (vi)
(d) (iv),(v) and (i)

6. One of the primary functions of the ground tissue in a plant is

(a) photosynthesis.
(b) to protect the plant.
(c) to anchor the plant.
(d) water and sugar conduction.

7. A pleiotropic gene

(a) Controls multiple traits in an individual.
(b) Is expressed only in primitive plants.
(c) Is a gene evolved during Pliocene.
(d) Controls a trait only in combination with another gene.

(a) A-(i), B-(ii), C-(iii), D-(iv)
(b) A-(iii), B-(i), C-(ii), D-(iv)
(c) A-(iii), B-(i), C-(iv), D-(ii)
(d) A-(ii), B-(iv), C-(iii). D-(i)

9. Which of the following pair has haploid structures?

(a) Nucellus and antipodal cells
(b) Antipodal cells and egg cell
(c) Antipodal cells and megaspore mother cell
(d) Nucellus and primary endosperm nucleus

10. Double fertilization is fusion of

(a) two eggs
(b) two eggs and polar nuclei with pollen nuclei
(c) one male gamete with egg and other with synergid
(d) one male gamete with egg and other with secondary nucleus