Stomach of human beings mainly digests

(a)

carbohydrates

(b)

proteins

(c)

fat

(d)

sucrose

Bile helps in the digestion of________

(a)

proteins

(b)

sugar

(c)

fats

(d)

carbohydrates

Excretion means______

(a)

taking in oxygen from the air and giving out carbon dioxide

(b)

disposal of harmful germs and worms from our body

(c)

distribution of digested food to the body tissues through blood

(d)

removal of nitrogenous wastes generated in the body

The structural and functional unit of the kidney is__________

(a)

villi

(b)

liver

(c)

nephron

(d)

ureter

The common passage meant for transporting urine and sperms in male is___________

(a)

ureter

(b)

urethra

(c)

vas deferens

(d)

scrotum