Questions and answers for exam Preparation

MCQs

Total Questions : 1277 | Page 7 of 128 pages

Question 61. The concept that various organisms dominated this planet during various geological time period and thus placing organisms in a time squence came from the studies by ?

Environmental biologist
Paleontologist
Marine biologist
Social biologist

Discuss Question

Answer: Option B. -> Paleontologist
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!

Question 62. Normally, in the process of osmosis, the net flow of water molecules into or out of the cell depends upon differences in the ?

Concentration of water molecules inside and outside the cell
Concentration of enzymes on either side of the cell membrane
Rate of molecular motion on either side of the cell membrane
None of these

Discuss Question

Answer: Option A. -> Concentration of water molecules inside and outside the cell
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!

Question 63. 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?

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

Discuss Question

Answer: Option B. -> Older sediment layers have less amount of these radioactive isotopes as that of the young ones.
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!

Question 64. Sodium ions are “pumped” from a region of lower concentration to a region of higher concentration in the nerve cells of humans. This process is an example of

Diffusion
Passive transport
Osmosis
Active transport

Discuss Question

Answer: Option D. -> Active transport
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!

Question 65. Biological sciences have a set methodology and it is based on ?

Experimental inquiry
Esthetic preference
Philosophical ideas
Imaginations

Discuss Question

Answer: Option A. -> Experimental inquiry
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!

Question 66. A series of hypothesis supported by the results of many tests is called ?

Scientific law
Theory
Data
Deduction

Discuss Question

Answer: Option B. -> Theory
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!

Question 67. An unbroken series of species arranged in ancestors to descendent sequence with each later species having evolved from one that immediately preceded it is called?