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