It is possible to date the rocks by comparing the amount of specific radioactive isotopes they contain. Which of the statement is correct in this respect?

1. 1. Older sediment layers have equal amount of these radioactive isotopes as that of the young ones
   2. Older sediment layers have greater amount of these radioactive isotopes as that of the young ones
   3. Older sediment layers did not have these radioactive isotopes
   4. Older sediment layers have less amount of these radioactive isotopes as that of the young ones

The part the body may be repaired, replaced or removed_____.

1. 1. Surgery
   2. Pharmacology
   3. Medicine
   4. Physiology

Fungi which get their food directly from dead organic matter are called_____.

1. 1. Parasitic fungi
   2. Decomposers
   3. Predators
   4. Mutualists

Most of the photosynthesis on earth is carried by_____.

1. 1. Kelps
   2. Algae
   3. Gymnosperms
   4. Angiosperms

An educated guess is called:

1. 1. Hypothesis
   2. Accumulated Data
   3. Observation
   4. Conclusion

Maintenance of normal resting potential via movement of K+ inside the cell and na+ out is a/an _____process?

1. 1. Passive
   2. Active
   3. Diffusional
   4. All of these

Receptors for hearing come under heading of_____.

1. 1. Chemical
   2. Photo
   3. Nociceptors
   4. Mechanical

Which of the following secrete hydrochloric acid in stomach?

1. 1. Oxyntic
   2. Mucosa
   3. Goblet
   4. Epithelial

Outer surface of bones is covered by a dense layer of connective tissue, called as _____.

1. 1. Woven bone
   2. Periosteum
   3. Epithelium lining
   4. Connective lining

Which of the following is a selectively permeable membrane?

1. 1. cell membrane
   2. cell wall
   3. cytoplasm
   4. All of these