Zoology - Online Test
Q1. Evolution and natural selection is demonstrated by
Answer : Option C
Explaination / Solution:
Evolution and natural selection can be demonstrated by DDT resistance in Mosquito. Earlier, mosquitoes are not resistance to DDT. They get killed due to presence of DDT but later on more DDT is used and due to natural selection mosquito become resistant to DDT.
Q2. The number of categories in hierarchical classification is
Answer : Option B
Explaination / Solution:
Taxonomical studies of all known organisms have led to the development of common categories such as kingdom, phylum (for animals) or division (for plants), class, order, family, genus and species. Hence, the correct option is 7.
Q3. Forests controls drought through
Answer : Option B
Explaination / Solution:
The volume of water retained by forests can depend on characteristics such as forest cover area, the length of vegetation growing season, tree composition and tree density, as well as the age and the number of layers of vegetation cover. Water retention by forests affects the amount and timing of the water delivered to streams and groundwater by increasing and maintaining infiltration and storage capacity of the soil. Forests can soak up excess rainwater, preventing run-offs and damage from flooding. By releasing water in the dry season, forests can also help provide clean water and mitigate the effects of droughts. Drought is due to less rainfall.
Q4.
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.
Q5. 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.
Q6. 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.
Q7. 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.
Q8. 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.
Q9. 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.
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.
