STEM QUIZ 2

Study the food web above.

Which phenomenon will occur when rabbits are removed from the system?

• The quantity of grass will increase.

• The quantitiy of fruits will decrease.

• More deers will be eaten by tigers

• The number of owls will decrease

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An antacid relieves an overly acidic stomach because the main components of antacids are _______.

• Isotopes

• Bases

• Acids

• Neutral

A student eats several kinds of food and he finds that the parts of tongue X and Y in Diagram 1are stimulated.

Which of the following are the food eaten by the student?

I Common salt

II Honey

III Lemon

IV Coffee

• I and II

• III and IV

• II and III

• I and IV

How many teeth does an adult human have?

• 22

• 31

• 32

• 42

On the periodic table, what symbol stands for silver?

• S

• Ag

• Si

• Au

Which of the following blood vessels allows the exchange of gases?

• Veins

• Artery

• Aorta

• Capillary

Carbon monoxide is produced when fuel is burnt with insufficient amount of oxygen. In excessive amount, why could this become harmful to humans?

• carbon monoxide blocks the transmission of signals in the nervous system

• carbon monoxide causes irritation in the respiratory system

• carbon monoxide damages the kidney and prevents secretion of waste from the body

• carbon monoxide binds with haemoglobin and disturbs the circulation of oxygen in the body

Remoras are fish that generally latch on to sharks and eat leftovers of food from the shark. This is an example of which type of ecological relationship?

• Mutualism

• Parasitism

• Commensalism

• Competition

When stung by a wasp, the area that had been stung can be treated with....

• baking soda

• toothpaste

• vinegar

• water