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411.
The scientific name of bread wheat is:
A. T. durum
B. T. dicoccum
C. T. aestivum
D. T. monecoccum
Answer: C
Explanation:
412.
The scientific name of maize is:
A. Glycine max
B. Hordeum vulgare
C. Zea mays
D. None of them
Answer: C
Explanation:
413.
The segregation of individuals in the F2 or in a later generation of a cross, which shows a more extreme development of a character than either parent is termed as:
A. Hybridisation
B. Heterosis
C. Linkage
D. Transgressive segregates
Answer: D
Explanation:
414.
The series of changes in the vegetation of a pond, lake, marsh or a stream are together known as:
A. Hydrosere
B. Xerosere
C. Biosphere
D. None of above
Answer: A
Explanation:
415.
The series of changes in the vegetation of bare rocky beds, rocky hill slopes sand beds into, extreme scarcity of water are together known as:
A. Hydrosere
B. Xerosere
C. Mesosere
D. Xerophytes
Answer: B
Explanation:
416.
The situation where an egg cell is developed into an embryo' without fertilization, is described as:
A. Apomixis
B. Parthenocarpy
C. Sexual reproduction
D. Parthenogenesis
Answer: D
Explanation:
417.
The slender stalk by which ovule is attached to the placenta is known as:
Answer: A
Explanation:
418.
The stage of prophase occur in:
A. Mitosis
B. Meiosis
C. Amitosis
D. Free cell formation
Answer: B
Explanation:
419.
The staminate ______ plants out yield pistillate plants by about 25 per cent.
A. Asparagus
B. Lettuce
C. Spinach
D. Hemp
Answer: A
Explanation:
420.
The structure of chromosome can best be observed during:
A. Prophase
B. Metaphase
C. Anaphase
D. Telaphase
Answer: B
Explanation:
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