FSC Biology Book MCQs Chapter 1 Class 12


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Biology Ch 1 Class 12 Homeostasis

1 / 65

Negative feedback mechanism is the characteristic of which class?

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

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

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

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

NUMS 2014
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Which one is not a nitrogen waste?

NUMS 2018
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The disease in which patients passed urine that rapidly turned black on exposure to air is called:

NTS 2011
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The excretion of hypertonic urine in humans is associated best with the:

PMC 2020
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Glomerulus in kidneys is made up of:

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As an excretory organ, liver:

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Malpighian tubules are involved in excretion in:

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Reabsorption of calcium is triggered by:

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In animals excess of nitrogen is excreted primarily in form of

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Deamination in the liver initially produces:

NTS 2010
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Which organ is called the body thermostat?

NUMS 2020
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Purine and pyrimidine catabolism results in production of

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Ammonia is chief excretory product in:

NUMS 2014
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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 excretory product in produced in plants during autotrophic mode of life?

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Rose is an example of

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Sunken stomata are found in:

NUMS 2014
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23 / 65

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

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

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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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26 / 65

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

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

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

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Capillaries present around the loop of Henle:

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Sphincter muscle in urinary system present near the junction of:

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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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Right kidney is slightly lower than left kidney due to:

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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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Ureter open into the urinary bladder through:

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Urine formation is the result of:

NTS 2015 SMBBMC
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36 / 65

Which one of the following group of animals is homeothermic?

NUMS 2014
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37 / 65

The only possible treatment in end stage renal failure is:

NUMS 2018
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In humans, the temperature regulation control center is located in:

PMC 2020
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Which of the following reduces the rate of transpiration by adaptations in xerophytes?

NUMS 2019 Cancelled
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Which of the following structure in plant’s body is called excretophores?

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

PMC 2020
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Urine leaves the kidney through a duct called:

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The characteristic which enable animals to tolerate dehydration is called

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

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

NUMS 2014
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The excretory product that requires minimum water for its elimination compared to others is:

NUMS 2017
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In osmosis water molecules move from area of _______ to _______ through semipermeable memberane

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Humans are:

NUMS 2016
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Which of the following types of transpiration account for 5 – 7 % of total transpiration that take place in plants?

NUMS 2019 Cancelled
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50 / 65

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

PMC 2020
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Which of the following statement about Homeostasis is incorrect

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Which of the following substances helps to concentrate urine?

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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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54 / 65

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

NTS 2014
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The condition of a stable internal environment in an organism is:

NTS 2015 SMBBMC
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Most of the marine invertebrates are

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

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

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Which of the following statement about conifers is correct?

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Terrestrial animals like kangaroo rat survive even without drinking water since

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

NUMS 2018
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62 / 65

Which part of the brain regulates body temperature?

NTS 2016 SMBBMC
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The concentration of Na ions in the body fluids is controlled by the ____ hormone.

NTS 2012
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The technique used for the non-surgical removal of kidney stones is called:

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Thick, waxy & leathery cuticle around leaves is present in

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