The pitcher plant (Nepenthes) has modified leaves to trap insects primarily to obtain: MCQ with Answer and Explanation

The pitcher plant (Nepenthes) has modified leaves to trap insects primarily to obtain:
A. Oxygen
B. Nitrogen
C. Carbohydrates
D. Water
Answer: Option B
Solution (By JKExamLibrary)
The pitcher plant is an insectivorous (carnivorous) plant. Its leaves are modified into pitcher-shaped structures to trap and digest insects. This adaptation is primarily to supplement the plant's nitrogen intake, as it typically grows in nitrogen-deficient soils (like bogs). The digested insects provide essential nitrogenous compounds.

Discuss this Question (0)

No comments yet. Be the first to start the discussion!

Practice More Biology Questions

Question #1
The 'Hormone Glucagon' is secreted by the alpha cells of the pancreas. Its primary effect on the liver is to:
A. Increase the uptake of glucose by liver cells
B. Inhibit the release of glucose into the blood
C. Promote the breakdown of glycogen to glucose (glycogenolysis) and the synthesis of glucose from non-carbohydrates (gluconeogenesis)
D. Promote the conversion of glucose to glycogen (glycogenesis)

Correct Answer: Option C


Explanation:
Glucagon is a peptide hormone secreted by the alpha cells of the pancreatic islets in response to low blood glucose levels (hypoglycemia). Its primary target is the liver, where it acts to raise blood glucose levels. It stimulates glycogenolysis (the breakdown of stored glycogen into glucose) and gluconeogenesis (the synthesis of new glucose from non-carbohydrate sources like amino acids and glycerol). It also promotes the breakdown of fats (lipolysis) in adipose tissue. It has the opposite effect of insulin.

This question belongs to: Science Biology
Question #2
Which of the following is the primary target organ for the hormone insulin?
A. Kidney
B. Liver
C. Brain
D. Heart

Correct Answer: Option B


Explanation:
Insulin acts primarily on liver, muscle, and adipose tissue. The liver is a key target where insulin promotes glycogenesis (glucose to glycogen), glycolysis, and lipogenesis, and inhibits gluconeogenesis, lowering blood glucose. Muscle and adipose tissue also respond. Brain takes up glucose independently of insulin via GLUT1 transporters. Thus liver is a principal target.

This question belongs to: Science Biology
Question #3
Erythroblastosis fetalis is a severe condition caused by the incompatibility of blood groups between the mother and fetus, specifically involving the:
A. Rh factor (Rhesus factor)
B. Duffy antigen
C. ABO blood group system
D. Kell antigen

Correct Answer: Option A


Explanation:
Erythroblastosis fetalis (hemolytic disease of the newborn) is primarily caused by Rh incompatibility. It occurs when an Rh-negative mother carries an Rh-positive fetus. During the first pregnancy, fetal Rh+ red blood cells may enter the mother's circulation, prompting her to produce anti-Rh antibodies. In subsequent pregnancies with an Rh+ fetus, these antibodies cross the placenta and destroy the fetal red blood cells, causing severe anemia and jaundice.

This question belongs to: Science Biology