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Q:

Which of the following classes of animals has/have three-chambered heart?

A) Pisces and Amphibia B) Amphibia and Reptilia
C) Reptilia only D) Amphibia only
 
Answer & Explanation Answer: B) Amphibia and Reptilia

Explanation:

Mammalian and avian hearts have four chambers two atria and two ventricles.Amphibians and reptiles, by contrast, have a three-chambered heart. The three-chambered heart consists of two atria and one ventricle.Fish possess the simplest type of true heart a two-chambered organ composed of one atrium and one ventricle.

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Q:

Which type of permanent tissue helps the aquatic plants to float?

A) Aerenchyma B) Collenchyma
C) Sclerenchyma D) No option is correct
 
Answer & Explanation Answer: A) Aerenchyma

Explanation:
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Q:

In September 2017, who launched ‘Pradhan Mantri LPG Panchayat Yojna’?

A) Narendra Modi B) Dharmendra Pradhan
C) Piyush Goyal D) R.K. Singh
 
Answer & Explanation Answer: B) Dharmendra Pradhan

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Q:

......... reproduces by binary fission

A) Amoeba B) Liverfiuke
C) Plasmodium D) Planaria
 
Answer & Explanation Answer: A) Amoeba

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Exam Prep: AIEEE

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Q:

Vitamin A is also known as _____.

A) Thiamine B) Riboflavin
C) Retinol D) Calciferol
 
Answer & Explanation Answer: C) Retinol

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Q:

Which of the following bacterium causes crown gall disease in plants?

A) Bacillus thurigiensis B) Agrobacterium tumefaciens
C) Pseudomonas fluorescens D) None of these
 
Answer & Explanation Answer: B) Agrobacterium tumefaciens

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Q:

Human beings' hearing range is _______.

A) 50 to 50,000 Hz B) 40 to 40,000 Hz
C) 30 to 30,000 Hz D) 20 to 20,000 Hz
 
Answer & Explanation Answer: D) 20 to 20,000 Hz

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Q:

The predominant stage of the life cycle of a moss is the gametophyte which consists of two stages. The second stage is the ___________ stage.

A) Agar B) Leafy
C) Chlorella D) protonema
 
Answer & Explanation Answer: B) Leafy

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