Science Practice Quiz 143

Q1.What is the term used to describe the breakdown of complex components of food into simpler substances?

A. Photosynthesis B. Respiration C. Digestion D. Excretion

Q2.Carbohydrates are described in the text as what type of substances?

A. Simple substances B. Essential vitamins C. Complex substances D. Mineral compounds

Q3.Which of the following animals is mentioned in the text as sucking the nectar of plants?

A. Snakes like the python B. Infants of human and many other animals C. Bees and humming-birds D. Some aquatic animals

Q4.How do snakes like the python primarily obtain their food, according to the provided text?

A. By filtering tiny food particles B. By feeding on mother’s milk C. By swallowing the animals they prey upon D. By scraping food from surfaces

Q5.Which of the following statements accurately describes the feeding mechanism of a starfish as per the provided text?

A. Starfish uses its tentacles to capture prey and then digests it externally. B. Starfish first opens the hard shell of its prey, then pops out its stomach through its mouth to consume the soft animal. C. Starfish absorbs nutrients directly from the water after breaking down shells with digestive enzymes. D. Starfish swallows its prey whole, including the hard shell, and then digests it internally.

Q6.According to the provided text, which of the following is NOT listed as a compartment of the human alimentary canal?

A. Oesophagus B. Gall bladder C. Small intestine D. Rectum

Q7.The continuous canal through which food passes in humans, also known as the alimentary canal, begins at which part of the body?

A. Stomach B. Oesophagus C. Buccal cavity D. Small intestine

Q8.What is the primary function of digestive juices secreted by glands like salivary glands, liver, and pancreas?

A. To absorb water from undigested food. B. To convert complex food substances into simpler ones. C. To transport digested food to various body parts. D. To store excess nutrients for future use.

Q9.What together constitutes the human digestive system?

A. Only the alimentary canal. B. Only the associated glands like salivary glands, liver, and pancreas. C. The digestive tract and its associated glands. D. The stomach, small intestine, and large intestine only.

Q10.According to the provided information, through which part of the body is food taken in by humans?

A. Through the oesophagus. B. Through the stomach. C. Through the mouth. D. Through the small intestine.

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Science Practice Quiz 143