12th Class Biology MCQS Support and Movement

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12th Class Biology MCQS


Kidney health is described in terms of :
Water retension
Blood clot
Rate of filteration
The number of kidney stones

Which of the following is the last structure that urine passes through duration its excretion from the body?
Distal Tubule
Ureter
Urinary bladder
Urethra

On over the wound the cambium forms
Gall
Callus
Wood tissues
Both a & b

Fibroblasts and osteoblasts migrate into the fracture site and begin to construct
Muscle
Cartilage
Bone
Joint

Buoyancy in the water is maintained by a specialized structure in bony fish called
Tail
Fins
Swim bladder
Both a & c

The process that normally exerts the greatest control over the water balance of an individual is:
Evaporation through the skin
Kidney function
Sweating
Respiratory loss

The process during which potassium and hydrogen ions and some toxic substances are put into urine is called:
Filtration
Tubular secretion
Reabsorption
Countercurrent multiplication

Which of the following NOT dispose off a type of waste directly to the environment?
Respiratory system
Circulatory system
Digestive system
Urinary system

An animal that worms itself mainly by absorping from its surroundings is known as:
Endotherm
None of these
Homoiotherm
Ectotherm

Cytokinins delay the aging of fresh leaf crops such as cabbage and lettuce as well as keeping flowers
Attached
Delayed
Open
Fresh

Active membrane potential is
Both a & b
– 50 mv
0.07 volts
0.05 volts

The organic portion of bones matrix is important in providing all but:
To resist stretch
Flexibilty
Tensile strength
Hardness

The most toxic substance routinely found in the blood are metabolities of what type of molecule?
Fats
Nucleic acids
Carbohydrates
Proteins

Arthritis covers over 100 different types of inflammatory or degenerative diseases that damage the
Joints
Sutures
Legs
Arms

Each intervetebral disc is a cushion like pad composed of
Nucleus pulposus
Stomium globosus
Annulus fibrosus
Both a & b

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