- What is a defining characteristic of Digononta?
- A) Presence of a single ovary
- B) Two ovaries
- C) Lack of a foot
- D) Presence of a corona
Answer: B) Two ovaries
- In which environment are Digononta primarily found?
- A) Marine
- B) Freshwater
- C) Terrestrial
- D) Both marine and terrestrial
Answer: B) Freshwater
- What is the typical reproductive method for Digononta?
- A) Budding
- B) Sexual reproduction
- C) Parthenogenesis
- D) Fragmentation
Answer: B) Sexual reproduction
- Which structure aids in locomotion for Digononta?
- A) Tentacles
- B) Cilia
- C) Flagella
- D) Pseudopodia
Answer: B) Cilia
- What is a common name for organisms classified under Digononta?
- A) Sea monkeys
- B) Rotifers
- C) Water bears
- D) Copepods
Answer: B) Rotifers
- Which of the following describes the body structure of Digononta?
- A) Unsegmented
- B) Segmented
- C) Radially symmetrical
- D) Bilaterally symmetrical
Answer: A) Unsegmented
- What role do Digononta play in aquatic ecosystems?
- A) Primary producers
- B) Consumers and decomposers
- C) Parasites
- D) Keystone species
Answer: B) Consumers and decomposers
- Digononta are part of which larger group of organisms?
- A) Annelids
- B) Rotifers
- C) Cnidarians
- D) Mollusks
Answer: B) Rotifers
- Which reproductive strategy is common among Digononta?
- A) Asexual reproduction only
- B) Sexual and asexual reproduction
- C) Budding only
- D) Fragmentation
Answer: B) Sexual and asexual reproduction
- What is the function of the corona in Digononta?
- A) Attachment to substrates
- B) Feeding
- C) Excretion
- D) Locomotion
Answer: B) Feeding
- In terms of symmetry, Digononta typically exhibit what type?
- A) Radial symmetry
- B) Bilateral symmetry
- C) Asymmetrical
- D) Pentaradial symmetry
Answer: B) Bilateral symmetry
- What is a notable feature of Digononta’s life cycle?
- A) Presence of a larval stage
- B) Direct development
- C) No larval stages
- D) Only adult forms
Answer: A) Presence of a larval stage
- Which of the following genera is classified under Digononta?
- A) Brachionus
- B) Asplanchna
- C) Lecane
- D) Monostyla
Answer: B) Asplanchna
- What type of feeding mechanism do Digononta utilize?
- A) Predatory feeding
- B) Filter feeding
- C) Parasitic feeding
- D) Absorptive feeding
Answer: B) Filter feeding
- What is the typical habitat for Digononta?
- A) Freshwater environments
- B) Marine environments
- C) Terrestrial environments
- D) Brackish water
Answer: A) Freshwater environments
- Which of the following statements about Digononta is true?
- A) They possess two reproductive structures
- B) They have a complex nervous system
- C) They are exclusively marine
- D) They lack cilia
Answer: A) They possess two reproductive structures
- What is the primary mode of locomotion for Digononta?
- A) Swimming using flagella
- B) Cilia movement
- C) Crawling on surfaces
- D) Floating passively
Answer: B) Cilia movement
- In terms of ecological interaction, Digononta primarily serve as what?
- A) Predators
- B) Prey for larger organisms
- C) Parasites
- D) Decomposers only
Answer: B) Prey for larger organisms
- What is the primary function of the foot in Digononta?
- A) Attachment to substrates
- B) Locomotion
- C) Feeding
- D) Respiration
Answer: A) Attachment to substrates
- Which of the following statements about Digononta is false?
- A) They can reproduce sexually and asexually
- B) They have a complex life cycle
- C) They exclusively inhabit saltwater
- D) They are important in nutrient cycling
Answer: C) They exclusively inhabit saltwater
- Digononta can often survive harsh conditions by entering which state?
- A) Dormant state
- B) Resting state
- C) Larval state
- D) Adult state
Answer: B) Resting state
- What type of morphological diversity do Digononta exhibit?
- A) High diversity in body forms
- B) Uniform body shape
- C) Lack of morphological variation
- D) Only two body types
Answer: A) High diversity in body forms
- Which of the following describes the feeding strategy of Digononta?
- A) Absorbing nutrients directly from the water
- B) Filtering small particles from the water
- C) Hunting and capturing prey
- D) Grazing on algae
Answer: B) Filtering small particles from the water
- In terms of ecological roles, Digononta contribute to what process in aquatic ecosystems?
- A) Primary production
- B) Nutrient cycling
- C) Sediment formation
- D) Water purification
Answer: B) Nutrient cycling
- What type of structure do Digononta have for sensory perception?
- A) Compound eyes
- B) Sensory bristles
- C) Tentacles
- D) Antennae
Answer: B) Sensory bristles
- Which class of Rotifera includes organisms with two gonads?
- A) Monogononta
- B) Digononta
- C) Bdelloidea
- D) Seisonidea
Answer: B) Digononta
- Digononta are known for their ecological role. Which of the following is NOT a role they typically play?
- A) Decomposers
- B) Consumers
- C) Primary producers
- D) Prey
Answer: C) Primary producers
- Which of the following statements is true about Digononta’s reproductive strategy?
- A) They only reproduce asexually
- B) They can reproduce sexually or asexually
- C) They reproduce exclusively through budding
- D) They have no reproductive structures
Answer: B) They can reproduce sexually or asexually
- What ecological significance do Digononta have in freshwater systems?
- A) They are invasive species
- B) They help control algal populations
- C) They are primary producers
- D) They are predators of larger organisms
Answer: B) They help control algal populations
- In terms of habitat, Digononta thrive in which of the following?
- A) Deep sea trenches
- B) Intertidal zones
- C) Ponds and lakes
- D) Sandy beaches
Answer: C) Ponds and lakes