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1) Insects breathe through tiny holes called spiracles.
Required Option: Option B
★ In insects such as cockroaches, there are numerous number of holes on the sides of their body that directly lead to the respiratory organs called spiracles.
2) Carbon dioxide turns lime water milky.
Required Option: Option B
★ When we breathe out carbon dioxide into a container containing lime water, the clear solution turns milky.
CO₂ + Ca(OH)₂ (aq.) → CaCO₃ + H₂O
3) Gills can absorb oxygen dissolved in water.
Required Option: Option B
★ Gills are the respiratory organs of organisms that live under water [for example, fishes]. These organs are tiny projections in the skin that contain blood vessels that helps in the exchange of gases.
4) The component of blood that helps in clotting is platelets.
Required Option: Option B
★ Platelets are the blood components present in the plasma that help to clot blood when a wound occurs. When there is a new wound, there will be a damaged blood vessel and the brain sends signals to the platelets to clot the wound.
5) Water rises in the xylem due to transpiration pull.
Required Option: Option B
★ When the stomata expels the extra water content to cool the plant [the process is called transpiration], it creates a negative tension that pulls the water in the xylem upwards. This process is known as transpiration pull.