- What is the primary habitat of Seisonidea?
- A) Freshwater
- B) Marine
- C) Terrestrial
- D) Brackish water
Answer: B) Marine
- Seisonidea are classified under which larger group of organisms?
- A) Annelids
- B) Rotifera
- C) Cnidarians
- D) Mollusks
Answer: B) Rotifera
- Which of the following is a defining characteristic of Seisonidea?
- A) Presence of two ovaries
- B) Lack of a foot
- C) Presence of a corona
- D) Absence of cilia
Answer: C) Presence of a corona
- What is the primary mode of locomotion for Seisonidea?
- A) Crawling
- B) Swimming using flagella
- C) Ciliary movement
- D) Floating passively
Answer: C) Ciliary movement
- What type of symmetry do Seisonidea typically exhibit?
- A) Bilateral symmetry
- B) Radial symmetry
- C) Asymmetry
- D) Pentaradial symmetry
Answer: A) Bilateral symmetry
- Which of the following structures do Seisonidea use for feeding?
- A) Tentacles
- B) Ciliated corona
- C) Specialized jaws
- D) Siphons
Answer: B) Ciliated corona
- What type of reproductive strategy is common in Seisonidea?
- A) Sexual reproduction
- B) Asexual reproduction only
- C) Budding
- D) Fragmentation
Answer: A) Sexual reproduction
- Which of the following genera is classified under Seisonidea?
- A) Brachionus
- B) Seison
- C) Asplanchna
- D) Monostyla
Answer: B) Seison
- What is a unique feature of the Seisonidea life cycle?
- A) Direct development
- B) Absence of larval stages
- C) Presence of a resting stage
- D) Continuous reproduction
Answer: C) Presence of a resting stage
- What ecological role do Seisonidea typically play?
- A) Primary producers
- B) Parasites
- C) Consumers and decomposers
- D) Keystone species
Answer: C) Consumers and decomposers
- Which type of feeding mechanism do Seisonidea utilize?
- A) Absorptive feeding
- B) Filter feeding
- C) Predatory feeding
- D) Grazing
Answer: B) Filter feeding
- What kind of body plan do Seisonidea exhibit?
- A) Segmented
- B) Unsegmented
- C) Radially symmetrical
- D) Pseudocoelomate
Answer: B) Unsegmented
- Seisonidea are often found associated with which of the following organisms?
- A) Algae
- B) Crustaceans
- C) Fungi
- D) Plants
Answer: B) Crustaceans
- Which of the following statements about Seisonidea is true?
- A) They are exclusively freshwater organisms
- B) They have a simple body structure
- C) They possess complex nervous systems
- D) They are obligate parasites
Answer: B) They have a simple body structure
- What is the primary function of the foot in Seisonidea?
- A) Locomotion
- B) Attachment to substrates
- C) Feeding
- D) Excretion
Answer: B) Attachment to substrates
- What type of sensory structures do Seisonidea possess?
- A) Sensory bristles
- B) Compound eyes
- C) Tentacles
- D) Antennae
Answer: A) Sensory bristles
- Which of the following describes the ecological significance of Seisonidea?
- A) They are top predators in their ecosystem
- B) They help control algal populations
- C) They serve as primary producers
- D) They have no ecological impact
Answer: B) They help control algal populations
- What type of reproduction can occur in Seisonidea?
- A) Only asexual reproduction
- B) Both sexual and asexual reproduction
- C) Budding only
- D) No reproduction
Answer: B) Both sexual and asexual reproduction
- What feature distinguishes Seisonidea from other rotifers?
- A) Their association with crustaceans
- B) Their color
- C) Their size
- D) Their feeding habits
Answer: A) Their association with crustaceans
- What type of larvae do Seisonidea produce?
- A) Directly developed larvae
- B) Free-swimming larvae
- C) Non-motile larvae
- D) Cystic larvae
Answer: B) Free-swimming larvae
- In terms of ecological roles, Seisonidea primarily serve as what?
- A) Predators
- B) Prey for larger organisms
- C) Primary producers
- D) Decomposers only
Answer: B) Prey for larger organisms
- Which of the following is NOT a characteristic of Seisonidea?
- A) Presence of cilia
- B) Marine habitat
- C) Exclusively terrestrial
- D) Simple body structure
Answer: C) Exclusively terrestrial
- What do Seisonidea feed on?
- A) Larger zooplankton
- B) Microorganisms and organic particles
- C) Plant material
- D) Sediment
Answer: B) Microorganisms and organic particles
- Which class of Rotifera does Seisonidea belong to?
- A) Monogononta
- B) Digononta
- C) Seisonidea
- D) Bdelloidea
Answer: C) Seisonidea
- What is the main advantage of the resting stage in Seisonidea?
- A) Increased feeding efficiency
- B) Survival during unfavorable conditions
- C) Enhanced locomotion
- D) Greater reproductive success
Answer: B) Survival during unfavorable conditions
- What type of circulatory system do Seisonidea have?
- A) Open circulatory system
- B) Closed circulatory system
- C) No circulatory system
- D) Simple vascular system
Answer: C) No circulatory system
- How do Seisonidea contribute to nutrient cycling in their environment?
- A) By consuming large organisms
- B) By breaking down organic matter
- C) By producing nutrients
- D) By forming symbiotic relationships
Answer: B) By breaking down organic matter
- What type of habitat is most conducive for Seisonidea?
- A) Polluted waters
- B) Clean, clear waters
- C) Stagnant waters
- D) Alkaline lakes
Answer: B) Clean, clear waters
- Seisonidea are often studied in relation to which of the following fields?
- A) Botany
- B) Marine biology
- C) Genetics
- D) Ornithology
Answer: B) Marine biology
- Which of the following adaptations helps Seisonidea survive in their environment?
- A) Large size
- B) Resting stage during unfavorable conditions
- C) Complex behavior
- D) Fast swimming ability
Answer: B) Resting stage during unfavorable conditions