A. Arteries
B. Capillaries
C. Veins
D. none of these
0
The branch of biology which deals with the study of social behavior and communal life of human beings living in any environment is called ?
0
__________ is essential for the formation of hemoglobin.
A. Environmental biology
B. Social biology
C. Human biology
D. Both b and c
1
Out of 92 naturally occurring chemical elements how many are considered as bio-elements?
A. Calcium
B. Iron
C. Water
D. Carbohydrates
0
___________ are needed as a source of energy for the vital activities of the body?
A. 6
B. 16
C. 26
D. 15
0
Oxygen accounts for ____ % of totals human body mass?
A. Calcium
B. Iron
C. Water
D. Carbohydrates
0
The atoms of different elements combine with each other through ionic or covalent bonding to produce compounds this stable form is called:
A. 65%
B. 18%
C. 10%
D. 3%
0
Which one of them is a micro-molecule?
A. An organ
B. A molecule
C. Tissue
D. Both a and c
0
A structure formed by groups of similar cells organized into loose sheets or bundles performing similar functions is called as:
A. Polysaccharide
B. Protein
C. Hemoglobin
D. ATP
Download App