Biology - Online Test
Q1.
Each pectoral girdle :
i. has 2 pairs of bones, a pair of clavicle and a pair of scapula.
ii. scapula contains expanded process and glenoid cavity, the latter is for articulation of the head of humerus.
Answer : Option A
Explaination / Solution:
The dorsal, flat, triangular body of scapula has a slightly elevated ridge called the spine which projects as a flat, expanded process called the acromion. Below the acromion is a depression called the glenoid cavity which articulates with the head of the humerus to form the shoulder joint.
Q2. Before use of mice for vaccine testing which animals were used to test the safety of batches of vaccine?
Answer : Option C
Explaination / Solution:
The batches of vaccine are tested for safety before use on human beings. Earlier vaccine batches are tested on monkey but now transgenic mice are used to test the safety of vaccine.
Q3. Avoiding prostitution and homosexuality to get away from genital warts is called
Answer : Option A
Explaination / Solution:
Prophylaxis is the preventive method to avoid any disease which may be fatal to the person. Genital warts is caused by prostitution and homosexuality. Prophylaxis includes use of condom and other methods to get direct contact between two partners.
Q4. If an osmotic system, one has a water potential of -1000 kPa while the other has -500kPa, which chamber has higher water potential?
Answer : Option A
Explaination / Solution:
Water potential of distilled water is 0. Presence of more solute reduce the water potential. So one having water potential -500 kPa is higher in comparison to one having -1000kPa water potential.
Q5. The most active phagocytic white blood cells are
Answer : Option C
Explaination / Solution:
The most active phagocytic white blood cells are nerutophils and monocytes. These cells try to engulf the microbes that enters the blood to cause disease.
Q6. The class of fungi in which mushroom is included is
Answer : Option C
Explaination / Solution:
Commonly known forms of basidiomycetes are mushrooms, bracket fungi or puffballs.
Q7. The endosperm cells in angiosperms are
Answer : Option D
Explaination / Solution:
Endosperm is the product of triple fission in which two polar nuclei fuse with one of the male gamete. Endosperm provide nutrient to the developing embryo
Q8. Which should be considered more realistic growth model
Answer : Option B
Explaination / Solution:
Verhulst-Pearl logistic model of growth is more realistic growth model in comparison to exponential model of growth. Population growing in a habitat having limited resources shows sigmoid curve like growth before reaching to carrying capacity.
Q9. Salt nutrition is
Answer : Option B
Explaination / Solution:
Salt nutrition is process of increase in respiration rate during mineral absorption by roots from soil.
Q10. Numerous folds present on inner surface of stomach are called rugae. Another part of digestive tract which contains rugae is
Answer : Option A
Explaination / Solution:
Numerous folds present on inner surface of stomach are called rugae. They are series of ridges produced by folding of the wall of an organ. Another part of digestive tract which contain rugae is palate, the top part of inside mouth.
