Zoology - Online Test
Q1. The number of births in polygamous population is often directly related to
Answer : Option B
Explaination / Solution:
Polygamous population is often directly related to number of females in the population. Polygamy means having more than one female partner with single male that can reproduce.2
Q2.
Trans fats :
i. they are found in most processed and fast foods for eg. French fries.
ii. they help food stay fresh for long time.
iii. they are much better type of fat than the saturated fats.
Answer : Option A
Explaination / Solution:
Trans fats are hydrogenated fats which makes the oil more solid. They are found in most processed and fast foods. They help food stay fresh for long time.
Q3. Which of the following factor do not motivate youngsters towards drug and alcohol use?
Answer : Option D
Explaination / Solution:
Curiosity, need for adventure and excitement and experimentation constitute common causes, which motivate youngsters towards drug and alcohol use.
Q4. Read the following :
i. In human iris, contraction of sphincter muscles widens the pupil in dim light to let in more light.
ii. The amount of pigment in the ciliary body of eye provides eye with its characteristic colour.
i. In human iris, contraction of sphincter muscles widens the pupil in dim light to let in more light.
ii. The amount of pigment in the ciliary body of eye provides eye with its characteristic colour.
Answer : Option C
Explaination / Solution:
Human eyes contain iris that is responsible for changing size of pupil to allow or preventthe amount of light entering the eyeball. Cons cells present in retina are responsible for colour perception.
Q5. The chromatin contains some basic proteins are called as
Answer : Option A
Explaination / Solution:
Histone proteins are the basic packer and arranger of chromatin.
Q6. Balbiani rings are the sites of
Answer : Option C
Explaination / Solution:
A Balbiani ring is a large chromosome puff. Balbiani rings are diffused uncoiled regions of the polytene chromosome that are sites of RNA transcription and protein synthesis.
They are formed in eukaryotic cells only.
Q7. The specialized centre which can reduce the inspiratory duration upon stimulation is
Answer : Option C
Explaination / Solution:
The pneumotaxic centre can moderate the functions of the respiratory rhythm centre. Neural signal from this centre can reduce the duration of inspiration and thereby alter the respiratory rate.
Q8. Which one is not a common fresh water fish
Answer : Option C
Explaination / Solution:
Hilsa is not a common fresh water fish. It is a marine fish. Common fresh water fish are Catla, Rohu and Common carp.
Q9. Nowadays,the greatest cause for extinction or biodiversity loss is
Answer : Option C
Explaination / Solution:
The greatest cause for extinction or biodiversity loss is the habit alteration. Deforestation causes loss of habits of a number of wild animals. Pollution of water also alter the habitat of aquatic organisms.
Q10. Glucose will be lost in the urine of patients suffering from :
Answer : Option C
Explaination / Solution:
Glucose will be lost in the urine of patients suffering from diabetes mellitus. It a chronic lifelong condition that affects our body ability to use the energy found in blood.
