Biology Questions and Answers for Competitive Exam

Selective Biology Questions and Answers:

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21. Presence of gill slits in the embryo of all vertebrates supports the theory of

(a) organic evolution

(b) recapitulation

(c) metamorphosis

(d) biogenesis

22. Appearance of ancestral characters in the new borne, such as tail, multiple mammae, etc., are

known as

(a) homologous

(b) analogous

(c) atavistic

(d) vestigial

23. Evolution is defined as

(a) history of race

(b) development of race

(c) history and development of race with variations

(d) progressive history of race

24. The book named “Philosophic zoologique” was published in 1809 and was written by:

(a) Mendel

(b) Darwin

(c) De Vries

(d) Lamarck

25. Mesophyll tissue is well differentiated into spongy tissue and palisade tissue in

(a) Dicot leaves

(b) Ophytic stem

(c) Hydrophytic stem

(d) Monocot leaves

26. Lateral meristem is responsible for

(a) Growth in parenchyma

(b) Growth in thickness

(c) Growth in cortex

(d) Growth in length.

27. As a tree grows older, which increases more rapidly in thickness?

(a) Sapwood

(b) Cortex

(c) Phloem

(d) Heartwood

28. What is the other name for the cork tissue?

(a) Phellogen

(b) Phelloderm

(c) Phellem

(d) Periderm

29. Commercial cork is obtained from the species of

(a) Berberis

(b) Quercus

(c) Salix

(d) Betula

30. The cross-section of a trunk of a tree showed 50 annual rings. The age of tree is

(a) 50 years

(b) 50 months

(c) 100 years

(d) 25 years

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