Zoology - Online Test
Q1. The phylum in which adults exhibit radial symmetry and larva exhibit bilateral symmetry is
Answer : Option B
Explaination / Solution:
The animals of Phylum – Echinodermata have an endoskeleton of calcareous ossiclesand, hence, the name Echinodermata. All are marine with organ-system level of organisation. The adult echinoderms are radially symmetrical but larvaeare bilaterally symmetrical.
They are triploblastic andcoelomate animals. Digestive system is complete with mouthon the lower (ventral) side and anus on the upper (dorsal)side.
Q2. Urethra is an 8 to 10 inch long muscular tube. The urethra passes through the prostate glands and end at the
Answer : Option C
Explaination / Solution:
Semen passes from the ejaculatory duct to the exterior of the body via urethra. The urethra passes through the prostate glands and ends at the external urethral orifice.
Q3. Which of the following nitrogenous base produces nucleoside only with ribose sugar?
Answer : Option D
Explaination / Solution:
Uracil nitrogenous base is produces nucleoside only with ribose sugar. This nucleoside is present only inside the RNA and absent in DNA.
Q4. Agriculture by using only biofertilizers is called
Answer : Option C
Explaination / Solution:
Organic farming is the practice of agriculture in which no chemical substance is used as fertilizers, pesticides or insecticides. Biofertilizers are used to provide nutrient.
Q5. Mayank stood still for a long time and he felt swelling of feet. What would you suggest him :
Answer : Option D
Explaination / Solution:
During long hours of standing still swelling of feet is observe due to accumulation of blood in lower limb due to gravitation effect. This can be corrected by jerk or wriggle of legs to restart circulation properly.
Q6. The metal which is inert and when swallowed remains non-toxic but becomes severely toxic when inhaled in volatile form:
Answer : Option A
Explaination / Solution:
Mercury is inert and when swallowed remain non-toxic but becomes severely toxic when inhaled in volatile form. It enters the respiratory system and riches to lungs to cause lung cancer.
Q7.
Which phase of meiosis in animal cell is shown in figure given below?
Answer : Option B
Explaination / Solution:
In diakinesis phase of prophase of meiosis I terminalisation of chismata takes place which is visualized in picture.
Q8. The particles used to coat with DNA in Biolistic gun is of
Answer : Option B
Explaination / Solution:
DNA is coated with tungsten before used in biolistic gun for inserting the DNA directly into target cells for obtaining particular protein.
Q9. All of the following organs help in excretion except :
Answer : Option B
Explaination / Solution:
Lungs help in excretion of carbon dioxide, liver help in excretion of toxic substance and skin help in removal of extra salts along with sweat. Heart is the organ that pumps the blood in body.
Q10. What was the mixture of gases used in chamber marked A?
Answer : Option C
Explaination / Solution:
The gases used in Urey and Miller experiment in chamber marked A are Methane , ammonia , hydrogen , and water
