- What is the primary habitat of Eutardigrada?
- A) Terrestrial
- B) Freshwater and marine
- C) Desert
- D) Soil
Answer: B) Freshwater and marine
- Eutardigrada are commonly known as what?
- A) Water bears
- B) Tardigrades
- C) Sea cucumbers
- D) Marine worms
Answer: B) Tardigrades
- Which of the following features is characteristic of Eutardigrada?
- A) Segmented body
- B) Eight legs
- C) Presence of wings
- D) Rigid exoskeleton
Answer: B) Eight legs
- Eutardigrada primarily feed on what?
- A) Detritus
- B) Plant cells and microorganisms
- C) Blood of other organisms
- D) Algae and phytoplankton
Answer: B) Plant cells and microorganisms
- Which structure helps Eutardigrada in locomotion?
- A) Tentacles
- B) Lobopods
- C) Fins
- D) Cilia
Answer: B) Lobopods
- What is the reproductive strategy of Eutardigrada?
- A) Sexual reproduction
- B) Asexual reproduction
- C) Budding
- D) Parthenogenesis
Answer: A) Sexual reproduction
- Which of the following statements about Eutardigrada is true?
- A) They have a complex circulatory system.
- B) They can survive extreme conditions.
- C) They are exclusively marine organisms.
- D) They possess complex eyes.
Answer: B) They can survive extreme conditions.
- What type of body symmetry do Eutardigrada exhibit?
- A) Radial symmetry
- B) Bilateral symmetry
- C) Asymmetry
- D) Pentaradial symmetry
Answer: B) Bilateral symmetry
- Which environment do Eutardigrada commonly inhabit?
- A) High altitude
- B) Deep sea
- C) Mosses and lichens
- D) Sandy beaches
Answer: C) Mosses and lichens
- What type of digestive system do Eutardigrada possess?
- A) Simple sac-like
- B) Complete digestive system
- C) Incomplete digestive system
- D) No digestive system
Answer: B) Complete digestive system
- Eutardigrada are known for their ability to survive in what conditions?
- A) Extreme heat
- B) High pressure
- C) Extreme desiccation
- D) Low oxygen
Answer: C) Extreme desiccation
- Which structure is primarily involved in respiration for Eutardigrada?
- A) Gills
- B) Body surface
- C) Lungs
- D) Specialized breathing structures
Answer: B) Body surface
- What is the body cavity of Eutardigrada called?
- A) Coelom
- B) Hemocoel
- C) Pseudocoelom
- D) Gastrovascular cavity
Answer: B) Hemocoel
- Which of the following is NOT a characteristic of Eutardigrada?
- A) Soft-bodied
- B) Presence of lobopods
- C) Rigid exoskeleton
- D) Lack of segmentation
Answer: C) Rigid exoskeleton
- What is the typical size range of Eutardigrada species?
- A) 0.1-0.5 mm
- B) 0.5-1.5 mm
- C) 1.5-3 mm
- D) 3-5 mm
Answer: B) 0.5-1.5 mm
- Which of the following describes the Eutardigrada’s ability to enter a dormant state?
- A) Cryptobiosis
- B) Hibernation
- C) Estivation
- D) Torpor
Answer: A) Cryptobiosis
- Which of the following statements about Eutardigrada is correct?
- A) They have a complex circulatory system.
- B) They can endure extreme temperatures.
- C) They are primarily herbivorous.
- D) They exhibit complex reproductive behaviors.
Answer: B) They can endure extreme temperatures.
- What type of symmetry do Eutardigrada exhibit?
- A) Radial symmetry
- B) Bilateral symmetry
- C) Asymmetry
- D) Pentaradial symmetry
Answer: B) Bilateral symmetry
- What is the primary food source for Eutardigrada?
- A) Microorganisms
- B) Plants
- C) Other animals
- D) Detritus
Answer: A) Microorganisms
- Which of the following structures helps Eutardigrada in nutrient absorption?
- A) Tentacles
- B) Stylet
- C) Gills
- D) Mucus layer
Answer: B) Stylet
- How do Eutardigrada typically respond to adverse environmental conditions?
- A) Migration
- B) Hibernation
- C) Entering a cryptobiotic state
- D) Reproduction
Answer: C) Entering a cryptobiotic state
- Which structure is used by Eutardigrada for excretion?
- A) Nephridia
- B) Malpighian tubules
- C) Coelomoducts
- D) Body surface
Answer: B) Malpighian tubules
- What type of environment do Eutardigrada prefer?
- A) Dry and arid
- B) Moist and humid
- C) High salinity
- D) Cold and icy
Answer: B) Moist and humid
- Eutardigrada belong to which larger group of animals?
- A) Mollusca
- B) Arthropoda
- C) Ecdysozoa
- D) Deuterostomia
Answer: C) Ecdysozoa
- What type of locomotion do Eutardigrada primarily use?
- A) Jet propulsion
- B) Crawling
- C) Gliding
- D) Floating
Answer: B) Crawling
- Which of the following is a common predator of Eutardigrada?
- A) Small fish
- B) Larger invertebrates
- C) Birds
- D) Amphibians
Answer: B) Larger invertebrates
- What kind of reproductive strategy do Eutardigrada exhibit?
- A) Internal fertilization
- B) External fertilization
- C) Asexual reproduction
- D) Budding
Answer: A) Internal fertilization
- Which of the following organisms are considered relatives of Eutardigrada?
- A) Annelids
- B) Onychophorans
- C) Mollusks
- D) Echinoderms
Answer: B) Onychophorans
- What is the primary ecological role of Eutardigrada?
- A) Primary producers
- B) Decomposers
- C) Predators
- D) Parasites
Answer: B) Decomposers
- Which of the following best describes the physical appearance of Eutardigrada?
- A) Long and thin
- B) Stout and plump
- C) Flat and ribbon-like
- D) Cylindrical and elongated
Answer: B) Stout and plump