Biology - Comprehensive Mock Test 158

Question 1571 Medium

Aquatic animals excrete nitrogenous waste commonly in the form of?

A) ammonia B) Urea C) Uric acid D) Trimethylamine oxide

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Question 1572 Easy

Which of the following is most toxic?

A) ammonia B) Urea C) Uric acid D) Trimethylamine oxide

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Question 1573 Medium

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

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

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Question 1574 Medium

It has been estimated that in a normal person plasma constitutes about ____ by vulume of blood?

A) 35% B) 45% C) 55% D) 75%

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Question 1575 Medium

Symbionts which help plants in uptake of phosphorous and trace metals such as zinc and copper?

A) Rhizome B) Viruses C) Fungi D) Cyanobacterid

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Question 1576 Medium

Stomatal transpiration is _____ of total transpiration?

A) 90% B) 91% C) 93% D) 95%

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Question 1577 Medium

More than ______ compounds of tar of tobacco smoke are involved to cause cancer?

A) 5 B) 90 C) 15 D) 10

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Question 1578 Easy

% age of CO2 carried as carboxyhaemoglobin is?

A) 5% B) 70% C) 20% D) 10%

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Question 1579 Easy

In most birds air sacs are _____ in number?

A) 10 B) 3 C) 4 D) 9

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Question 1580 Medium

When abdomen expands, the number of spiracles open is?

A) 2 B) 3 C) 6 D) 8

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