Biology Mcqs

They are considered to be the most primitive and are surely the first of the vertebrates?

A. Frogs
B. Reptiles
C. Amphibinas
D. Jawless fishes

Scolidon or dog fish belong to the group of fishes called__________?

A. Cartilaginous fishes
B. Bony fishes
C. Running fishes
D. Jawless fishes

Nephrostome in earthworm opens in____________?

A. External space
B. Internal Body cavity
C. In gut
D. In Bladder

The nephridia of earthworm open into the coelom by_________?

A. Nephrostome
B. Nephridiopore
C. Flame cell
D. Anus

Mammalian kidney, under restricted water supply can conserve water by over ________ % reabsorption of glomerular filtrate

A. 80.50%
B. 90.50%
C. 95.50%
D. 99.50%

Which of the following filtrate contains excessive amount of amino acids, glucose, and salts?

A. Glomerular filtrate
B. Filtrate passing through ascending limb
C. Filtrate passing through distal conveluted tubule
D. Filtrate passing through collecting tubules

Malphighian tubules absorb waste materials and salts from__________?

A. Blood
B. Lymph
C. Gut
D. Hemolymph

Which of the following openings have cilia?

A. Nephrostome
B. Nephridiopore
C. Both of these
D. None of these

Which of the following animal excrete nitrogenous waste mainly as uric acid?

A. Hydra
B. Planaria.
C. Humans
D. Birds.

Thick, waxy & leathery cuticle around leaves is present in___________?

A. Hydrophytes
B. Mesophytes
C. Xerophytes
D. Halophytes