1391. O2 accounts for_______ % of totals human body mass ______.

A. 65%
B. 18%
C. 10%
D. 12%

1392. The atoms of different elements combine with each other through Ionic or covalent bonding to produce compounds ,This stable from is called _____.

A. An organ
B. A molecule *
C. Tissue
D. Both A and C

1393. The branch of biology that deals with the structure of organisms, the cell and their organelles at molecular level is _______.

A. Cell biology
B. Molecular biology *
C. Microbiology
D. Biotechnology

1394. The molecules of low molecular weight such as water and carbon dioxide are termed ______.

A. Organic biology
B. Micro molecules *
C. Macro molecules
C. Inorganic molecule

1395. The specialized structure in the cells comparable to the organs of the body that accomplish functions of the cells are termed _______.

A. Tissues
B. Organs
C. Organelles *
D. Systems

1396. Groups of similar cells organized into loose sheets of bundles that perform similar functions are called _______.

A. Organs
B. Cells
C. System
D. Tissues *

1397. The branch of biology in which structure mode of transmission life histories and host-parasite relationships are studied is termed ________.

A. Microbiology
B. Parasitoogy *
C. Biotechnology
D. Social Biology

1398. Members of one species inhabiting the same area make a _______.

A. Population *
B. Biome
C. Community
D. Group

1399. Name the poison which is present in the seeds of apple _____.

A. Cyanogenic glycosides *
B. Caladium
C. Avocado
D. Asparagus

1400. Elephant ear is the name of plant. It is also known as ______.

A. Caladium
B. Avocado
C. Asparagus
D. Radish *