Kanika noticed that her potted plant was not growing healthily. She put few earthworms into the pot. After a few weeks, she noticed that her plants looked healthier. What could be the possible reason for this?
A The earthworms ate up the pests in the soil.
B The earthworms helped the plant to take in water.
C The earthworms allowed the plant to make food faster.
D The earthworms increased the air and nutrient content of the soil.
both option A and D are correct as earthworms also eat the pests and increase the air and nutrient content of the soil as these are some of the main reasons why the earthworm is called the farmer's friend.
Which of the following statements regarding the given figure is correct?
AFigure represents transport of water in a section of root.
BFigure represents transport of food in a section of root.
CP represents root hair and Q represents phloem.
DFigure represents transport of minerals in a section of stem.
What is the use of cooking oil in frying a fish in terms of heat transfer?
ATo increase rate of heat transfer to the fish via radiation
BTo increase rate of heat transfer to the fish via convection.
CTo increase rate of heat transfer to the fish via conduction.
DTo increase rate of heat transfer to the fish via evaporation.