Biology - Online Test
Q1. A group of closely related families is called
Answer : Option B
Explaination / Solution:
Class includes a group of related orders, Genus comprises a group of related species, species is a basic unit of classification. Hence, the correct option is Order.
Q2. Auxins are mostly produced in
Answer : Option C
Explaination / Solution:
Auxins are generally produced in growing apices of shoot and root. These two regions are the meristematic cells which are actively taken part in cell division.
Q3. Corm is a modification of
Answer : Option D
Explaination / Solution:
Corm is an organ of perenation and vegetative propagation consisting of a short erect fleshy swollen underground stem. It store food material.
Q4. Fundamental ecosystem services are taken as granted because
Answer : Option A
Explaination / Solution:
Researchers have put an average price tag of US $33 trillion a year on these fundamental ecosystems services, which is largely taken for granted because they are free. This service includes nature’s life support system without which life is not possible on this planet.
Q5. In a woman, pelvis is larger and has broader front than a man. It is :
Answer : Option D
Explaination / Solution:
In a woman, pelvis is larger and has broader front than a man. It is an adaptation for gestation and parturition during pregnancy.
Q6. Which out of the following is advantage of chemical safety testing on transgenic animals?
Answer : Option C
Explaination / Solution:
Transgenic animals are made to carry gene that make them sensitive to toxic substance than non-transgenic animals and exposed to toxic substance. Toxicity testing in transgenic animals allows us to obtain results in less time.
Q7.
Statement I: Infection or diseases transmitted through sexual intercourse are called sexually transmitted disease or venereal disease.
Statement II: Tuberculosis is a sexually transmitted disease caused by bacteria.
Statement III: Hepatitis B is transmitted by use of contaminated water.
Answer : Option D
Explaination / Solution:
Infection or diseases transmitted through sexual intercourse are called sexually transmitted disease or venereal disease. Tuberculosis is not transmitted by sexual intercourse, so it is not a STD.
Hepatitis B infection is caused by the hepatitis B virus (HBV). The virus is passed from person to person through blood, semen or other body fluids. Common ways HBV is transmitted include: Sexual contact
Q8. Intercalated discs occurs
Answer : Option B
Explaination / Solution:
Intercalated discs are microscopic identifying features of cardiac muscles fibres. Individual heart muscle cells are connected by intercalated discs to work as a single functional organ.
Q9. The body of fungus is filamentous and it is called
Answer : Option B
Explaination / Solution:
The body of filamentous fungus is known as mycelium, which is a thread like structure. Mycelium produces hyphae and sporegenous cells to produce spores.
Q10. Osmotic pressure cannot became zero in a cell. It is zero only in case of
Answer : Option A
Explaination / Solution:
Osmotic pressure cannot become zero in cell as it always content some amount of solute particles. Osmotic pressure is zero only in case of pure water or distilled water.
