Biology today

6262 MTMTBIOLOGY TODAYBIOLOGY TODAY || MARCH ‘16MARCH ‘16

(a) A - (i), B - (ii), C - (iii), D - (iv)

(b) A - (i), B - (iii), C - (ii), D - (iv)

(c) A - (iv), B - (iii), C - (ii), D - (i)

(d) A - (iv), B - (i), C - (ii), D - (iii)

8. Which of the following characters are not applicable to the
   anatomy of dicot stem and choose the correct statements
   given below?
   A. Collenchymatous hypodermis
   B. Exarch xylem
   C. Pith is absent
   D. Open vascular bundle
   E. Presence of medullary rays
   Of these
   (a) A, D and E only (b) B and C only
   (c) B and E only (d) A, B and C only


9. In dicotyledonous stem, which of the following is the
   sequence of tissues from inside to outside?
   (a) Pith, phloem, cambium, protoxylem, metaxylem,
   pericycle, parenchyma, collenchyma, endodermis and
   epidermis
   (b) Pith, cambium, phloem, protoxylem, metaxylem,
   pericycle, endodermis, parenchyma, collenchyma and
   epidermis
   (c) Pith, phloem, protoxylem, metaxylem, cambium,
   pericycle, endodermis, parenchyma, collenchyma and
   epidermis
   (d) Pith, protoxylem, metaxylem, cambium, phloem,
   pericycle, endodermis, parenchyma, collenchyma and
   epidermis


10. The kind of coelom represented in the diagram given below
    is characteristic of

Ectoderm

Endoderm

Mesoderm

(a) round worm (b) earthworm

(c) tape worm (d) cockroach.

11. Identify the given figure and select the
    correct option.
    (a) Neutrophil - phagocytic cell which
    destroy foreign organisms entering
    the body.
    (b) Eosinophil - their number increases during allergic
    infection.
    (c) Lymphocyte - small sized non-motile and non-
    phagocytic.
    (d) Monocyte - motile and phagocytic in nature.
    12. Which of the following groups of algae belongs to Class
    Rhodophyceae?
    (a) Laminaria, Fucus, Porphyra, Volvox
    (b) Gelidium, Porphyra, Dictyota, Fucus
    (c) Gracilaria, Gelidium, Porphyra, Polysiphonia
    (d) Volvox, Spirogyra, Ulothrix, Sargassum
    13. Read the following statements and identify the correct
    options given.
    A. Angiosperms range in size from microscopic Wolffia to
    tall trees of Eucalyptus.
    B. In angiosperms, the seeds are enclosed by fruits.
    C. Double fertilisation is an event unique to angiosperms.
    D. In angiosperms, each cell of an embryo sac is diploid.
    E. In angiosperms, the zygote develops into an endosperm.
    Of the above statements
    (a) A, B and D alone are correct.
    (b) A, B and E alone are correct.
    (c) A, B and C alone are correct.
    (d) B, C and D alone are correct.
    14. Refer the given figure of nephron.

A

B

C

D

Identify A, B, C and D and select the correct option

regarding them

(a) A-Glomerulus - a tuft of capillaries formed by afferent

arteriole.

(b) B-PCT-reabsorption of HCO 3 – and selective secretion

of H+ and K+ occurs here.

(c) C-DCT-almost all glucose, amino acids, water, Na+, K+

and uric acid are absorbed here.

(d) D-Collecting duct-extends from the cortex of the

kidney to the inner parts of medulla. Large amount of

water is secreted in this region.

15. Choose the wrongly matched pair.
    (a) Portion of myofibril - Sarcomere
    between two ‘Z’ lines
    (b) Isotropic band - Actin
    (c) Anisotropic band - Myosin
    (d) Central part of I-band - M-line


16. Which of the following statement(s) about taxonomical aids
    is/are true?
    I. Keys are used to identify plants and animals based on
    similarities and dissimilarities.