Biology - Online Test
Q1. A plant that is partially heterotrophic is
Answer : Option B
Explaination / Solution:
Drosera plant is partially heterotrophic. This plants capture insects to fulfill its protein requirement although it performs photosynthesis also.
Q2. Which of the following statement is true with respect to the movement through apoplast?
Answer : Option D
Explaination / Solution:
The apoplastic movement of water occursexclusively through the intercellular spaces and the walls of the cells. Movement through the apoplast does not involve crossing the cellmembrane. This movement is dependent on the gradient. The apoplast does not provide any barrier to water movement and water movement is through mass flow.
Q3. The outer most layer of maize endosperm is
Answer : Option A
Explaination / Solution:
Maize is monocotyledonous seed containing large amount of endosperm as reserve food. It is covered by a thin layer called as alurone layer. This layer is protective in nature.
Q4. Zone of Earth occupied by living organisms is called
Answer : Option B
Explaination / Solution:
The zone of earth occupied by living organism is called biosphere. It includes, lands, water and air where living organisms survive.
Q5. The productivity of a soil depends upon the proportionate amount of deficient mineral is called
Answer : Option B
Explaination / Solution:
Justus von Liebig's Law of the Minimum states that yield is proportional to the amount of the most limiting nutrient, whichever nutrient it may be.
From this, it may be inferred that if the deficient nutrient is supplied, yields may be improved to the point that some other nutrient is needed in greater quantity than the soil can provide, and the Law of the Minimum would apply in turn to that nutrient.
Q6.
Read the following statements :
i. In ruminants cellulose digesting bacteria are present in digestive system.
ii. Such digestion by microbial activity is called Anaerobic digestion.
iii. Camels are ruminants lacking omasum chamber.
Answer : Option C
Explaination / Solution:
- In ruminants like cows, buffalos, cellulose digesting bacteria are present in digestive system that release cellulose enzyme.
- Anaerobic digestion is a collection of processes by which microorganisms break down biodegradable material in the absence of oxygen.
- Camel is a psuedo ruminants as it has only 3 chambers instead of 4.
Q7. Which of the following drug is very effective sedative and painkiller?
Answer : Option C
Explaination / Solution:
Morphine is a very effective sedative and painkiller, and is very useful in patients who have undergone surgery.
Q8. While crying, tears come out of eyes but some watery fluid comes out of nose as well. This fluid is
Answer : Option D
Explaination / Solution:
While crying, tears come out of eyes. Sometimes water fluid also comes out of the nose as well. This water fluid coming out of the nose is due to excessive secretion of lacrimal glands.
Q9. The main plant body of the bryophyte is
Answer : Option C
Explaination / Solution:
The main plant body of the bryophyte is haploid. It produces gametes, hence is called a gametophyte.
Q10. The centrioles are absent in
Answer : Option B
Explaination / Solution:
Animal cells have centrioles which are absent in almost all plant cells.
