Composite fruit develops from

• single ovary

• inflorescence

• apocaropous ovary

• pericarp

Assertion : Aldosterone is a steroid hormone and is important in the control of sodium and potassium ion concentration in mammals.

Reason : It upgrades sodium ion concentration in the ECF by promoting reabsorption of sodium ions from renal tubules and excretion of potassium ions in urine.

• If both assertion and reason are true and reason is the correct explanation of assertion

• If both assertion and reason are true but reason is not the correct explanation of assertion

• If assertion is true but reason is false

• If both assertion and reason are false

Cocoa is the plant from which chocolate is made. Which part is used to extract it?

• Flower

• Fruits

• Seeds

• Bark

Assertion : Secreting hypotonic urine is effective in reducing urinary loss of water.

Reason : Hypotonic urine is more concentrated and higher in osmotic pressure than the blood.

• If both assertion and reason are true and reason is the correct explanation of assertion

• If both assertion and reason are true but reason is not the correct explanation of assertion

• If assertion is true but reason is false

• If both assertion and reason are false

Assertion : Torison can be seen in ctenidium.

Reason : Ctenidium acts as the respiratory organ.

• If both assertion and reason are true and reason is the correct explanation of assertion

• If both assertion and reason are true but reason is not the correct explanation of assertion

• If assertion is true but reason is false

• If both assertion and reason are false

Assertion : Blood coagulate in uninjured blood vessels.

Reason : Uninjured blood vessels release an anticoagulant heparin.

• If both assertion and reason are true and reason is the correct explanation of assertion

• If both assertion and reason are true but reason is not the correct explanation of assertion

• If assertion is true but reason is false

• If both assertion and reason are false.

Which among the following is a rootless plant?

• Nymphaea

• Sagittaria

• Ceratophyllum

• Vallisneria

Assertion : Astigmatism is due to uneven curvature of lens.

Reason : It is treated with cylindrical lenses.

• If both assertion and reason are true and reason is the correct explanation of assertion

• If both assertion and reason are true but reason is not the correct explanation of assertion

• If assertion is true but reason is false

• If both assertion and reason are false

Leghaemoglobin helps in

• imparting colour to floral petals

• protecting nitrogenase from O₂

• destroying bacteria

• transport of food in plants

Assertion : Smaller the organism higher is the rate of metabolism per gram weight.

Reason : The heart rate of a six month old baby is much lower than that of an old person.

• If both assertion and reason are true and reason is the correct explanation of assertion

• If both assertion and reason are true but reason is not the correct explanation of assertion

• If assertion is true but reason is false

• If both assertion and reason are false