The food of hydra consists of___________?
Correct answer: D. Small crustaceans
- A. Humus
- B. Detritus
- C. Dead microscopic animals
- D. Small crustaceans
Explanation
Hydra is a carnivorous freshwater animal that captures prey with its tentacles and stinging cells. Its food commonly includes small crustaceans and other small aquatic animals, which are then digested in its gastrovascular cavity. Students may choose c because Hydra can eat microscopic animals, but the standard option describing its usual prey here is small crustaceans.
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About Classification of Biological Molecules
Biological molecules are classified as carbohydrates, lipids, proteins and nucleic acids, with water, minerals and vitamins also supporting cellular processes. The key distinctions involve their monomers, chemical bonds, structures and functions, including glucose and starch, fatty acids and triglycerides, amino acids and polypeptides, and nucleotides in DNA and RNA.
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