In humans, schizont stage of Plasmodium is found inside:
liver cells only
liver, spleen and blood cells
RBCs and liver cells
RBCs only
In honey bee, royal jelly is secreted from :
corp gland
wax gland
pharyngeal gland
salivary gland
Which of the following is correct pair of disease and its causing agent ?
Soft - sour - Bacillus breveis
Gonorrhoea - Entamoeba
Syphilis - Troponema pallidum
Urethritis - Bacillus anthracis
As insecticides reach at higher trophic level in food chain their concentration :
increases
become irregular
remain constant
decreases
Which of the following cells are associated with immune system of body?
Neutrophils
Macrophages
Lymphocytes
All of these
To obtain amino-acids and other organic compounds, Stanley Miller and Urey used in his experiment :
mixture of O2, N2, CH4 and H2O
mixture of NH3, H2, N2 and H2O
mixture of H2, NH3, CH4, and H2O
mixture of H2, O2, CO2 and H2O
C.
mixture of H2, NH3, CH4, and H2O
In 1953, Stanley Miller and Urey put a mixture of ammonia, hydrogen and methane in an electric chamber connected with an inlet for water steam at 800C. After sparking and condensing of mixture, he get a solution containing glycerine, alanine, -alanine aspartic acid, amino - n-butyric acid etc.