Biology - Mock Test 230

Question 2291

Hydra has no specialized excretory system because?

A) It does not produce waste material B) Due to absence of mesoderm C) The whole body cells are in contact with water D) It has pseudocoelom.

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Question 2292

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

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

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Question 2293

Amount of water required to excrete 1gN of Urea is?

A) 1 ml B) 50 ml C) 100 ml D) 150 ml

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Question 2294

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 2295

Which of the following is most toxic?

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

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Question 2296

Purine and pyrimidine catabolism results in production of?

A) Creatinine B) Trimethyamine oxide C) Xanthine D) None of these

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Question 2297

In animals excess of nitrogen is excreted primarily in form of?

A) Creatinine B) Trimethyamine oxide C) Pyrimidine D) Ammonia

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Question 2298

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

A) Stem B) Leaves C) Flowers D) Roots

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Question 2299

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

A) CO2 B) H2O C) O2 D) Both A and B

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Question 2300

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

A) CO2 B) H2O C) O2 D) Both A and B

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