1951. The central fluid filled cavity of blastula is known as :
A. Archenteron
B. Blastocoels *
C. Blastocyst
D. Morula
1952. Genetic identity of a human male is determined by :
A. Autosomes
B. Nucleolus
C. Cell organelles
D. Sex chromosomes *
1953. Fertilizin is a chemical substance produced from :
A. Mature eggs *
B. Acrosome
C. Polar bodies
D. None of these
1954. Photosynthesis is a process :
A. Reductive and exergonic
B. Reductive and catabolic
C. Reductive ,endergonic and catabolic
D. Redutive, endergonic and anabolic *
1955. Phenomenon which converts light energy into chemical energy is :
A. Respiration
B. Photosynthesis *
C. Transpiration
D. None of these
1956. Osmosis is a function of :
A. The number of solute molecules present in the solutions on the two sides of the membrane that is selectively permeable
B. Pressure
C. Temperature
D. All of these *
1957. Which tissue is responsible for the passage of water in plants ?
A. Sclerenchyma
B. Xylem *
C. Collenchynatous
D. Phloem
1958. The vegetation of the thar desert consists of :
A. Xerophytes *
B. Hydrophytes
C. Mesophytes
D. Thilophytes
1959. A tissue which gives mechanical support to plant parts is :
A. Chlorenchyma
B. Sclerenchyma *
C. Parenchyma
D. Phloem
1960. Plants take nitorgen in the form of :
A. Ammonia
B. Nitrates *
C. Nitrites
D. None