Biology - Online Test
Q1. Study of human population is called as
Answer : Option A
Explaination / Solution:
The study of human population in a particular area is called demography. It includes the population density, number of male and female individuals and age group of population.
Q2. Which one of the following is correct pairing of a body part and muscle fibre that moves it?
Answer : Option C
Explaination / Solution:
The iris contains involuntary smooth muscles. It encircles the pupil of the iris and helps to dilate the pupil when there is insufficient light for the normal function of the eye.
Q3. In which class of fungi the mushroom belongs to
Answer : Option D
Explaination / Solution:
The mushroom belongs to class Basidiomyces to kingdom fungi. Basidiomycetes produce basidiospores as reproductive units. The member of this group grows on dead and decaying matters.
Q4. The neighbouring cells are connected through cytoplasmic strands that extend through
Answer : Option A
Explaination / Solution:
Neighbouring cells are connected through cytoplasmic strands that extend through plasmodesmata. During symplastic movement, the water travels through the cells – their cytoplasm; intercellular movement is through the plasmodesmata.
Q5. Main function of pollen tube is to
Answer : Option B
Explaination / Solution:
Pollen tube is formed by germination of pollen grain on stigma of flower. Pollen grain is transferred from stigma to receptive female gametes by pollen tube formed in the style of the pistil.
Q6. Antagonistic interactions will include
Answer : Option D
Explaination / Solution:
Antagonistic interaction will include predation and parasitism in which one species is benefited and other is harmed.
Q7. Which one of the following organism help in absorption of phosphorus from soil by plants
Answer : Option B
Explaination / Solution:
Glomus is a kind of algae found in soil. This organism help in absorption of phosphorous form soil by plants.
Q8. The process by which small electrolytes are absorbed
Answer : Option B
Explaination / Solution:
Small amounts of monosacharides like glucose, amino acids and some of electrolytes like chloride ions are generally absorbed by simple diffusion.
Q9. Heroine is commonly called smack is chemically
Answer : Option A
Explaination / Solution:
Heroine or smack is chemically Diacetylmorphine which is a semi-synthetic opioid. It is the 3,6-diacetyl derivative of morphine (hence diacetylmorphine) and is synthesised from it by acetylation. The white, odourless, bitter crystalline form is commonly the hydrochloride salt, diacetylmorphine hydrochloride. It has a high addiction potential.
Q10. In the process of eye donation a particular part of a dead man’s eye is stored and grafted on another person’s eye to restore vision. That donated part of eye is :
Answer : Option D
Explaination / Solution:
Eye donation process involves grafting of cornea of dead man’s eye, which is stored and grafted on another person’s eye to restore vision.
