Nutrition and Digestion in Organisms

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What is saprophytic nutrition primarily characterized by?

Obtaining food from living hosts

Using decaying organic matter as a food source (correct)

Synthesizing food through photosynthesis

Digesting food internally

Which of the following organisms is an example of a parasite?

Cow

Tick (correct)

Yeast

Mushroom

Which group of organisms includes both herbivores and carnivores?

Fungi

Animals (correct)

Saprophytes

Omnivores

How do saprophytes digest food?

Releasing enzymes to break down food externally Signup and view all the answers

Which of the following is NOT an example of animal nutrition?

Fungus Signup and view all the answers

What is one of the ways the muscular walls of the stomach assist in digestion?

Chemical digestion through enzymes Signup and view all the answers

What is the role of HCl in gastric juice?

To make the food medium acidic for enzyme activity Signup and view all the answers

What is the primary function of bile juice?

To make food alkaline and emulsify fats Signup and view all the answers

Which enzyme in gastric juice is responsible for breaking down proteins?

Pepsin Signup and view all the answers

Where is bile juice stored in the body?

Gall bladder Signup and view all the answers

What is produced by desert plants during the night?

Malic Acid Signup and view all the answers

Which process occurs first in the holozoic nutrition of human beings?

Ingestion Signup and view all the answers

What happens to the stomata of desert plants during the day?

They close to reduce water loss Signup and view all the answers

During which step of holozoic nutrition is food broken down into simpler substances?

Digestion Signup and view all the answers

What is the final product produced by desert plants with sunlight during the day?

Glucose Signup and view all the answers

Which organisms are classified as photoautotrophs?

Euglena Signup and view all the answers

What distinguishes chemoautotrophs from other autotrophs?

They use chemical energy from inorganic substances. Signup and view all the answers

Which of the following correctly describes holozoic nutrition?

Organisms take in complex organic materials for nourishment. Signup and view all the answers

Which of the following is a characteristic of photoautotrophs?

They convert light energy into chemical energy. Signup and view all the answers

What substance do chemoautotrophs typically oxidize to obtain energy?

Hydrogen sulfide Signup and view all the answers

What is the main purpose of photosynthesis in plants?

To convert light energy into chemical energy Signup and view all the answers

Which of the following is NOT a step in the process of photosynthesis?

Conversion of glucose into oxygen Signup and view all the answers

What role do stomata play in plants during photosynthesis?

They allow the exchange of gases Signup and view all the answers

What happens to guard cells when they fill up with water?

They swell and open the stomata Signup and view all the answers

Which molecule is produced as a result of the photolysis of water during photosynthesis?

Oxygen Signup and view all the answers

What is the primary role of the alimentary canal?

Digestion and absorption of food Signup and view all the answers

Which process occurs in the mouth that contributes to chemical digestion?

Action of salivary amylase Signup and view all the answers

What mechanism helps move food down the esophagus?

Peristaltic movement Signup and view all the answers

What role does the tongue play in the mouth?

Tasting food and aiding in swallowing Signup and view all the answers

What is NOT an associated organ that aids in digestion?

Large intestine Signup and view all the answers

What is the main function of the villi in the small intestine?

Increase surface area for absorption Signup and view all the answers

Which part of the small intestine is responsible for the majority of nutrient absorption?

Ileum Signup and view all the answers

What form are proteins absorbed as in the small intestine?

Amino acids Signup and view all the answers

Which enzyme is responsible for the digestion of carbohydrates in the small intestine?

Pancreatic amylase Signup and view all the answers

What is the primary function of the small intestine?

Final digestion and absorption of food Signup and view all the answers