The method of reproduction of new plants by cells instead of seed is known is_____.

1. 1. Tissue culture
   2. Mutation
   3. Antibiosis
   4. Recombination

Human blood is a viscous fluid due to_____.

1. 1. Platelets in plasma
   2. RBC and WBC in blood
   3. Sodium in serum
   4. Proteins in blood

The resolving power of electric microscope is_____.

1. 1. 0.2 mm
   2. 0.2 m
   3. 0.2 nm
   4. All of these

In human body 99% of total mass is formed of_____.

1. 1. 16 Bio-elements
   2. 6 Bio-elements
   3. 12 Bio-elements
   4. 10 Bio-elements

Reverse transcriptase is present in_____.

1. 1. All RNA viruses
   2. All DNA viruses
   3. All viruses
   4. All retroviruses

A series of hypothesis supported by the results of many tests is called _____.

1. 1. Scientific law
   2. Data
   3. Theory
   4. Deduction

Two or more populations of different species living and interacting in the same area from _____.

1. 1. Biosphere
   2. Population System
   3. Ecosystem
   4. Community

Diatomaceous earth is used for making _____.

1. 1. Fertilizers
   2. Fire proof bricks
   3. Weedicides
   4. Insecticides

Programmed death of cells is called_____.

1. 1. Necrosis
   2. Blood cancer
   3. Apoptosis
   4. All of these

Chemical substances used on living tissues that inhibit the growth of micro organism are called_____.

1. 1. Antiseptics
   2. Disinfectants
   3. Antibiotics
   4. Vaccines