Biology - Online Test
Q1. How many documented varieties of Basmati rice are grown in India?
Answer : Option C
Explaination / Solution:
Basmati rice is distinct for its unique aroma and flavour and 27 documented varieties of Basmati are grown in India.
India grows 650.000 tonnes of Basmati annually.
Q2. Which period of menstrual cycle is called risky period of conception?
Answer : Option B
Explaination / Solution:
10th to 17th day of menstrual cycle is called risky period of conception as during which ovulation takes. If sexual intercourse occurs during this period, there is a very high chance of fertilisation that may leads to pregnancy.
Q3. Nissl granules in a nerve cell are now identified as
Answer : Option D
Explaination / Solution:
The nissl granules in nerve cell are now identified as ribosomes after discovery of electron microscope that provides highly magnified image for detailed study.
Q4. In fungus, food reserves is
Answer : Option D
Explaination / Solution:
In fungus, the food reserve is glycogen and fat. Different fungi contain different kinds of reserve food materials depending upon habitat and body structure of fungus.4
Q5. The excess water collected in the form of droplets around special openings of veins near tip of leaves is called as
Answer : Option B
Explaination / Solution:
The excess water collects in the form of droplets around special openings of veins near the tip of grass blades, and leaves of many herbaceous parts. Such water loss in its liquid phaseis known as guttation.
Q6. The coconut water from tender coconut is nothing but
Answer : Option B
Explaination / Solution:
The coconut water from tender coconut is nothing but free nuclear endosperm made up of thousands of nuclei. The surrounding white kernel is the cellular endosperm.
Q7. Which statement explains amensalism?
Answer : Option A
Explaination / Solution:
One type of relationship that has been classified by biologists and ecologists is amensalism.
Amensalism is any relationship between organisms of different species in which one organism is inhibited or destroyed while the other organism remains unaffected.
Q8. Entry of ions into cells is called
Answer : Option D
Explaination / Solution:
Entry of ions into cells is called influx. Influx takes place actively against the concentration gradient by utilization of energy through plasmodesmata of plant cells.
Q9. Every cell contains DNA and when we consume plant /animal material , the DNA which reaches our digestive tract is digested by :
Answer : Option C
Explaination / Solution:
Food material consists of plant or animal cells. Each cell contain DNA in their nucleus. Digestion of DNA takes place in small intestine by the action of enzyme succus entricus.
Q10. Cirrhosis of liver is caused by the chronic intake of
Answer : Option B
Explaination / Solution:
Cirrhosis of liver is caused by the chronic intake of alcohol. Regular consumption of alcohol damages the liver cells. Cirrhosis of liver is a serious condition when normal liver tissue is replaced by scar tissue.
