Molecular formula of chlorophyll ‘a’ molecule is_____.

1. 1. C55H70O6N4Mg
   2. C55H72O5N4Mg
   3. C50H72O6N4Mg
   4. C55H70O5N4Mg

Endoskeleton is secreted by?

1. 1. Mesoderm
   2. Ectoderm
   3. Endoderm
   4. None of these

How many bones does a baby have_____.

1. 1. 212
   2. 300
   3. 306
   4. All of these

Maximum speed of nerve impulse transmission is_____.

1. 1. 120m/sec
   2. 100 m/sec
   3. 110 m/sec
   4. 130 m/se

E. coli and example of_____.

1. 1. Aerobic bacteria
   2. Anaerobic bacteria
   3. Microaerophilic
   4. Facultative bacteria

The only group of algae having no flagellated motile cells at any stage is_____.

1. 1. Rhodophyta
   2. Chrysophyta
   3. Phaeophyta
   4. Pyrrophyta

The skeleton of sponges is made up of_____.

1. 1. Calcium
   2. Silica
   3. Both A & B
   4. All of these

There are about _____muscles in human beings.

1. 1. 650
   2. 750
   3. 850
   4. 950

Astronauts may use which technique to grow fruits and vegetables ?

1. 1. Tissue culture techniques
   2. Hydroponic culture technique
   3. Cloning
   4. Pasterisation

Under resting membrane potentials:

1. 1. Outer surface of neuron is more positive
   2. Inner surface of neuron is more positive
   3. Both of these surfaces are equally positive
   4. All of these.