Zoology - Online Test
Q1. Expiration will take place when there is :
Answer : Option C
Explaination / Solution:
Expiration is the release of carbon dioxide rich air from thoracic cavity. When the volume of air decreases and pressure increase the air from chest moves out. This kinds of pressure is called positive intrapulmonary pressure.
Q2. Which of the following algae can be used as single cell protein?
Answer : Option B
Explaination / Solution:
Spirulina is single celled algae that can be easily grown in starch containing medium life waste water from potato processing plants. It contains high quantity of protein that can be easily used by human beings.
Q3. Interpret from the following graph :
Answer : Option D
Explaination / Solution:
Extinction rates are unaffected due to immigration near island and immigration far island. Extinction rate is affected by human interference.
Q4. Pituitary dwarfs will not show :
Answer : Option C
Explaination / Solution:
Pituitary dwarf hormone will show normal intelligence, stunned growth and inhibited growth of long bones. Pituitary dwarfs will no show mental retardation.
Q5. Locomotory organ of annelida is
Answer : Option D
Explaination / Solution:
Locomotory organ of annelia is parapodia. Parapodium are in form of lateral fleshy protrusions on the body surface that help in movement and capturing food.
Q6. Interstitial cells or leydig cells are present between
Answer : Option B
Explaination / Solution:
Leydig cells or interstitial cells are present between seminiferous tubules. Leydig cells secrete testosterone and other androgens hormones in human males.
Q7. The most abundant organic molecule present on earth is
Answer : Option B
Explaination / Solution:
Cellulose is the most abundant organic molecule present on earth. Cellulose forms the cell wall of all plant cells. Cell wall is the outermost protective layer of cell.
Q8. Blood pressure is expressed as the ratio of systolic over diastolic pressure. The difference between systolic and diastolic pressure is called pulse pressure. What will be its value for a normal healthy adult?
Answer : Option A
Explaination / Solution:
Pulse pressure is the difference between the systolic and diastolic pressure readings. It is measured in millimeters of mercury (mmHg). It represents the force that the heart generates each time it contracts. If resting blood pressure is (systolic-diastolic) 120-80 millimeters of mercury (mmHg), pulse pressure is 40
Q9. The most important of the symbiotic nitrogen fixing bacteria which forms nodules on the roots of legume plants is
Answer : Option D
Explaination / Solution:
Rhizobium are bacteria that fix nitrogen after becoming established inside root nodules of legumes. In order to express genes for nitrogen fixation, rhizobia require a plant host; they cannot independently fix nitrogen
Rhizobium bacteria is found in the nodule of leguminous plants root. It increases the fertility of soil.
Q10.
There are two types of ozone
i. Good ozone and bad ozone.
ii. Good ozone is present in stratosphere while bad ozone is present in troposphere.
Answer : Option A
Explaination / Solution:
There are two types of ozone, bad ozone and good ozone.
Bad ozone is present in troposphere, it is bad because it is a type of pollution. Ozone and other compounds in car exhaust form smog.
Good ozone is present in stratosphere, it is good because it protect us from harmful UV radiations from the Sun.
