Waec Biology 2013 Past Questions and Answers

Question 16:

• WAEC 2013

In humans, excretion of hypertonic urine is associated with the

A. Distal convoluted tubule
B. Loop of Henle
C. Bowman's capsule
D. Proximal convoluted tubule

Question 17:

• WAEC 2013

The maintenance of a stable internal environment within the body of a mammal is known as

A. Osmosis
B. Plasmolysis
C. Homeostasis
D. Excretion

Question 18:

• WAEC 2013

Which part of the nephron is associated with ultra-filtration?

A. Distal convoluted tubule
B. Proximal convoluted tubule
C. Collecting duct
D. Bowman's capsule

Question 19:

• WAEC 2013

Which of the following conditions would result result in a decrease in the production of antidiuretic hormone?

A. Abnormally high blood sugar level
B. Drinking large quantities of water
C. Increase in osmotic pressure of blood
D. Period of strenuous exercise

Question 20:

• WAEC 2013

Which of the following structures is not essential in a wind pollinated flower?

A. Anther
B. Ovary
C. Stigma
D. Petal