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421.
The study of ecology from the standpoint of individual species is called:
A. Synecology
B. Phytogeography
C. Autecology
D. None of the above
Answer: C
Explanation:
422.
The sugar found in DNA is:
A. Deoxyribose
B. Ribose
C. Fructose
D. Maltose
Answer: A
Explanation:
423.
When we place a living plant cell in a solution with an osmotic potential identical to that of its own cell sap the solution is:
A. Hypertonic
B. Hypotonic
C. Isotonic
D. None of the above
Answer: C
Explanation:
424.
The surface tension in any liquid is ______ related to the temperature:
A. Universally
B. Directly
C. Indirectly
D. Does not
Answer: A
Explanation:
425.
The tap root system is normally meant to:
A. Absorb water and mineral salts from the soil
B. Conduct water and mineral salts to the stem
C. Give proper encharge to plant
D. All of the above
Answer: D
Explanation:
426.
The term epistasis was originally used by _____ in 1909 to describe genes whose effects mark or cover the effects of other genes:
A. Wagner
B. Bateson
C. Hayman
D. Atwood
Answer: B
Explanation:
427.
The term genetics was coined by:
A. Gregor Mendel
B. Bateson
C. T.H. Morgan
D. H.J. Mujer
Answer: B
Explanation:
428.
The term heterosis was first used by:
Answer: B
Explanation:
429.
The term used in sugarcane breeding to denote the crossing of Sacharum officinarum with related species followed by one or more back crosses is called:
A. Mass selection
B. Crossing over
C. Cane improvement
D. Nobilisation
Answer: D
Explanation:
430.
The theory explaining the cause of variation and evolution, (Continuity of Gemplasm) was put forward by:
A. Charles Darwin
B. Gregor John Mendel
C. Weismann
D. Hugo de Vries
Answer: C
Explanation:
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