UF NEM3002 Final Exam UPDATED
QUESTIONS AND CORRECT ANSWERS
Which statement best reflects the ecological role of nematodes in soil? - CORRECT
ANSWER They contribute to nutrient cycling by feeding on bacteria, fungi, and other soil
organisms
Which of these nematode characteristics assists them in surviving extreme environments like deserts
or Antarctic soils? - CORRECT ANSWER Ability to enter dormant state
True or False: Phylogenetics compares information to infer evolutionary relationships between
organisms. - CORRECT ANSWER True
What is the primary purpose of using sugar centrifugation in nematode studies? - CORRECT
ANSWER To extract nematodes from soil
Which worm type has an acoelomate body plan? - CORRECT ANSWER Flatworms
The term Phylogenetics refers to the study of - CORRECT ANSWER Evolutionary
relationships
How many molts does a nematode typically undergo during its life cycle - CORRECT
ANSWER 4
Nematodes are primarily found in which types of habitats? - CORRECT ANSWER Marine,
freshwater, and terrestrial habitats
Which worm body plan has a true coelom and segmented body - CORRECT
ANSWER Annelids
Which of the following news topics about nematodes would most likely interest an ecologist -
CORRECT ANSWER Discovery of a nematode that decomposes plastic waste
, Which of the following extraction methods would best isolate live nematodes from root samples -
CORRECT ANSWER Baermann funnel technique
The evolutionary tree places nematodes closer to arthropods than flatworms. What does this suggest -
CORRECT ANSWER Nematodes share a more recent common ancestor with arthropods
Which statement is true about nematode body symmetry - CORRECT ANSWER They exhibit
bilateral symmetry
What feature helps differentiate nematodes from annelids - CORRECT ANSWER Lack of
segmentation and presence of a pseudocoelom in nematodes
If a new nematode species is discovered, what modern tool could best confirm its evolutionary
relationship to known nematodes - CORRECT ANSWER DNA sequencing and phylogenetic
analysis
What developmental process is typical of nematode embryogenesis - CORRECT
ANSWER Mosaic, determinate cleavage
What is the primary purpose of using sugar centrifugation in nematode studies - CORRECT
ANSWER To extract nematodes from soil
Which trophic group of nematodes is primarily responsible for regulating microbial populations in the
soil - CORRECT ANSWER Bacterivores
What is a key characteristic of the dauer stage in nematodes - CORRECT ANSWER Complete
metabolic shutdown and hardening of the cuticle
In what type of habitat would you expect to find the highest nematode diversity - CORRECT
ANSWER Moist, undisturbed forest soils
Why are nematodes considered a keystone group in the soil food web - CORRECT
ANSWER They regulate microbial communities and facilitate nutrient cycling
QUESTIONS AND CORRECT ANSWERS
Which statement best reflects the ecological role of nematodes in soil? - CORRECT
ANSWER They contribute to nutrient cycling by feeding on bacteria, fungi, and other soil
organisms
Which of these nematode characteristics assists them in surviving extreme environments like deserts
or Antarctic soils? - CORRECT ANSWER Ability to enter dormant state
True or False: Phylogenetics compares information to infer evolutionary relationships between
organisms. - CORRECT ANSWER True
What is the primary purpose of using sugar centrifugation in nematode studies? - CORRECT
ANSWER To extract nematodes from soil
Which worm type has an acoelomate body plan? - CORRECT ANSWER Flatworms
The term Phylogenetics refers to the study of - CORRECT ANSWER Evolutionary
relationships
How many molts does a nematode typically undergo during its life cycle - CORRECT
ANSWER 4
Nematodes are primarily found in which types of habitats? - CORRECT ANSWER Marine,
freshwater, and terrestrial habitats
Which worm body plan has a true coelom and segmented body - CORRECT
ANSWER Annelids
Which of the following news topics about nematodes would most likely interest an ecologist -
CORRECT ANSWER Discovery of a nematode that decomposes plastic waste
, Which of the following extraction methods would best isolate live nematodes from root samples -
CORRECT ANSWER Baermann funnel technique
The evolutionary tree places nematodes closer to arthropods than flatworms. What does this suggest -
CORRECT ANSWER Nematodes share a more recent common ancestor with arthropods
Which statement is true about nematode body symmetry - CORRECT ANSWER They exhibit
bilateral symmetry
What feature helps differentiate nematodes from annelids - CORRECT ANSWER Lack of
segmentation and presence of a pseudocoelom in nematodes
If a new nematode species is discovered, what modern tool could best confirm its evolutionary
relationship to known nematodes - CORRECT ANSWER DNA sequencing and phylogenetic
analysis
What developmental process is typical of nematode embryogenesis - CORRECT
ANSWER Mosaic, determinate cleavage
What is the primary purpose of using sugar centrifugation in nematode studies - CORRECT
ANSWER To extract nematodes from soil
Which trophic group of nematodes is primarily responsible for regulating microbial populations in the
soil - CORRECT ANSWER Bacterivores
What is a key characteristic of the dauer stage in nematodes - CORRECT ANSWER Complete
metabolic shutdown and hardening of the cuticle
In what type of habitat would you expect to find the highest nematode diversity - CORRECT
ANSWER Moist, undisturbed forest soils
Why are nematodes considered a keystone group in the soil food web - CORRECT
ANSWER They regulate microbial communities and facilitate nutrient cycling
