Which one of the following characteristics is common in both humans and adult frogs?
1.  Internal fertilization
2.  Nucleated RBCs
3.  Ureotelic mode of excretion
4.  Four-chambered heart

In which one of the following organisms its excretory organs are correctly stated?
 

Which one of the following options gives the correct categorization of six animals according to the type of nitrogenous wastes (A, B, C) they give out?

A fall in glomerular filtration rate (GFR) activates:
1.  Adrenal cortex to release aldosterone
2.  Adrenal medulla to release adrenaline
3.  Posterior pituitary to release vasopressin
4.  Juxta glomerular cells, to release renin

Angiotensinogen is a protein produced and secreted by:

1. macula densa cells

2. endothelial cells (cells lining the blood vessels)

3. liver cells

4. juxtaglomerular (JG) cells

Earthworms are:

1. ureotelic when plenty of water is available

2. uricotelic when plenty of water is available

3. uricotelic under conditions of water scarcity

4. ammonotelic when plenty of water is available

A person who is on a long hunger strike and is surviving only on water, will have:

1. more sodium in his urine

2. less amino acids in his urine

3. more glucose in his blood

4. less urea in his urine

Consider the following four statements (A-D) about certain desert animals such as kangaroo rats: 

Which two of the above statements for such animals are true?

What will happen if the stretch receptors of the urinary bladder wall are totally removed?

1. Urine will not collect in the bladder

2. Micturition will continue

3. Urine will continue to collect normally in the bladder

4. There will be no micturition

Uric acid is the chief nitrogenous component of the excretory products of:

1. man 

2. earthworm

3. cockroach

4. frog