Biology Ch 1 Class 12 Homeostasis





Entry test 2023 MDCAT contains most of the Biology MCQs. FSC Part 1 bio book MCQs. HSSC Biology questions MCQs. Solved Chapterwise Biology MCQs for first-year 11 class MCQs. Second-year and first-year bio textbooks chapter-wise MCQs with the answer are provided here. PakLearningSpot PLS MCQs Bank website for FREE Entry test preparations

Marine fish can keep their internal environment hypertonic with respect to the surrounding salty water by retaining.

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Deamination in the liver initially produces:

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The site and principal mechanism for the passage of glucose into the bloodstream in the human kidney is the:

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Which organ is called the body thermostat?

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Reabsorption of calcium is triggered by:

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Purine and pyrimidine catabolism results in production of

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Which hormone prepares the body for situations of stress and emergency?

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Excretory system, consisting of protonephridia tubes, are present in phylum:

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Which of the following reduces the rate of transpiration by adaptations in xerophytes?

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Which of the following structure in plant’s body is called excretophores?

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Which one is not a nitrogen waste?

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The water content of mammalian blood is regulated by antidiuretic hormone(ADH). In which part of the nephron does regulation occur ?

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As an excretory organ, liver:

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Ammonia is chief excretory product in:

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In animals excess of nitrogen is excreted primarily in form of

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The technique used for the non-surgical removal of kidney stones is called:

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In comparison to a constantly changing external environment, _____ is when the body maintains the internal processes to work in a narrow range of internal fluctuations.

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Terrestrial animals like kangaroo rat survive even without drinking water since

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________ are animals that do not adjust their internal osmolality and are isotonic with their environment.

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In humans, the temperature regulation control center is located in:

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Which of the following fish drink large amount of sea water and excrete concentrated urine resulting in maximum salt excretion and minimal water loss?

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The condition of a stable internal environment in an organism is:

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Which of the following statement about conifers is correct?

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Sunken stomata are found in:

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In plants which of the following is a waste product produced both during photosynthesis and respiration

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In a hot summer after noon, if your body’s Homeostatic machinery keep your internal temperature quite lower than that of external than this is an example of

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Which one of the following group of animals is homeothermic?

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Which excretory product in produced in plants during autotrophic mode of life?

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The only possible treatment in end stage renal failure is:

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The concentration of Na ions in the body fluids is controlled by the ____ hormone.

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Negative feedback mechanism is the characteristic of which class?

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When the temperature of the surrounding environment rises, body responds by:

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Most of the marine invertebrates are

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Thick, waxy & leathery cuticle around leaves is present in

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Glomerulus in kidneys is made up of:

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Humans maintain their body temperature within a narrow limit due to their _____ characteristics.

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The mechanism of regulation, generally between organism and its environment, of solutes and the gain and the loss of water is called

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Right kidney is slightly lower than left kidney due to:

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The excretory product that requires minimum water for its elimination compared to others is:

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Rose is an example of

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Which of the following substances helps to concentrate urine?

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Which of the following statement about Homeostasis is incorrect

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Ureter open into the urinary bladder through:

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Which of the following types of transpiration account for 5 – 7 % of total transpiration that take place in plants?

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Which of the following fishes excrete large volume of diluted urine?

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When a frog is kept in water for some time it sheds a thin covering of skin called ____

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Humans are:

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Which part of the brain regulates body temperature?

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The disease in which patients passed urine that rapidly turned black on exposure to air is called:

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The excretion of hypertonic urine in humans is associated best with the:

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Malpighian tubules are involved in excretion in:

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The major portion of (NH)2CO is secreted by:

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The mechanism by which substances are removed from the blood and are directly added to the tubular fluids is called:

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Urine leaves the kidney through a duct called:

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The active uptake of sodium in the ascending limb or thick loop of Henle is promoted by the action of:

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Which of the following marine fishes are considered direct descendents of fresh water ancestors?

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The human body maintains all of its cells’ internal concentration _____ to internal body fluid.

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Sphincter muscle in urinary system present near the junction of:

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Which of the following occurs in the body in response to the secretion of Glucagon?

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High level of _____ and _____ in the blood and the contributing factors in the formation of kidney stones.

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In osmosis water molecules move from area of _______ to _______ through semipermeable memberane

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Capillaries present around the loop of Henle:

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The characteristic which enable animals to tolerate dehydration is called

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In a marine environment, the ion secreted by the kidney is:

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Urine formation is the result of:

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