NEM 3002 UF Final Exam Questions and Answers Graded A+
Nematodes are roundworms. T or F - Answers True
Which of the following are invertebrates?
- Earthworms
- Flatworms
- Nematodes
- Frogs - Answers Earthworms, Flatworms, Nematodes
Where can nematodes be found? - Answers As said in the lecture, treasure is everywhere.
Nematodes can be found in all marine, freshwater, and terrestrial environments (soil) and are
typically the most abundant invertebrate.
Nematodes are: - Answers - pseudocoelomate, protosomes
What is phylogenetics and how is it done? - Answers Phylogenetics is the study of relationships
between organisms and helps understand ancestry and descendants. Commonly done by
grouping organisms with their most recent common ancestor and other descendants based on
genetics.
Nematodes embryogeny begins with the formation of the mouth from or near the blastopore. T
or F - Answers True
If a nematode is isolated by spinning a water sample in a centrifuge, this is considered a
passive extraction. T or F - Answers True
What is a benefit to the nematode body shape/size in a soil environment? - Answers They can fit
into soil pores to find food that other organisms cannot.
Nematode diversity is greatest in the soil (if including plants and invertebrates within soil
habitats) T or F - Answers True
What is the number of molts in a nematode life cycle? - Answers 4
what roles do nematodes play in soil ecology? - Answers primary, secondary, and tertiary
consumers
Which nematode trophic group usually have a needle shaped mouth part called stylet?
- Herbivore
- Predator
, - Fungivore
- Omnivore
- Bacteriovore - Answers Herbivore, Fungivore
How do you extract nematodes from soil? - Answers There are a few ways but tools needed are
very simple: a shovel, auger, t-tube, etc. An active method is to extract nematode through the
Baermann funnel where you fill the funnel with soil and water. Over time the method takes about
24-72 hours and only live nematodes will sink to the bottom of the funnel. The passive method
is sieving and centrifuging, where the nematodes will clump at the bottom after the
centrifugation (dead or alive)
Which is the correct order of egg layer development? - Answers vitelline, chitin, lipid
This egg layer provides structural strength. - Answers Chitin
This egg layer is impermeable. - Answers Lipid
Can nematodes see light? - Answers They have sensory structures although they do not have
eyes like humans and other mammals. The structures enhance the nematode's awareness to
the environment around them, so they don't require eyes to see light.
order the three steps of nematode molting - Answers apolysis,
formation of new cuticle,
ecdysis
order the steps of nematode hatching - Answers juvenile movement, enzymatic breakdown of
eggshell,
change in egg permeability.
Which is the correct order of nematode cuticle parts from internal to external? - Answers
epidermis, basal, median, cortical, epicuticle
Match the nematode body orientation with the correct features - Answers Dorsal --> teeth
Ventral --> Vulva, Anus
Lateral --> Amphids
In nematodes, neuromuscular process are sent out to the nerve. T or F - Answers True
The predominant neurotransmitter in nematodes is: - Answers ACh
The ____________ is responsible for worm architecture - Answers Epidermis
Nematodes are roundworms. T or F - Answers True
Which of the following are invertebrates?
- Earthworms
- Flatworms
- Nematodes
- Frogs - Answers Earthworms, Flatworms, Nematodes
Where can nematodes be found? - Answers As said in the lecture, treasure is everywhere.
Nematodes can be found in all marine, freshwater, and terrestrial environments (soil) and are
typically the most abundant invertebrate.
Nematodes are: - Answers - pseudocoelomate, protosomes
What is phylogenetics and how is it done? - Answers Phylogenetics is the study of relationships
between organisms and helps understand ancestry and descendants. Commonly done by
grouping organisms with their most recent common ancestor and other descendants based on
genetics.
Nematodes embryogeny begins with the formation of the mouth from or near the blastopore. T
or F - Answers True
If a nematode is isolated by spinning a water sample in a centrifuge, this is considered a
passive extraction. T or F - Answers True
What is a benefit to the nematode body shape/size in a soil environment? - Answers They can fit
into soil pores to find food that other organisms cannot.
Nematode diversity is greatest in the soil (if including plants and invertebrates within soil
habitats) T or F - Answers True
What is the number of molts in a nematode life cycle? - Answers 4
what roles do nematodes play in soil ecology? - Answers primary, secondary, and tertiary
consumers
Which nematode trophic group usually have a needle shaped mouth part called stylet?
- Herbivore
- Predator
, - Fungivore
- Omnivore
- Bacteriovore - Answers Herbivore, Fungivore
How do you extract nematodes from soil? - Answers There are a few ways but tools needed are
very simple: a shovel, auger, t-tube, etc. An active method is to extract nematode through the
Baermann funnel where you fill the funnel with soil and water. Over time the method takes about
24-72 hours and only live nematodes will sink to the bottom of the funnel. The passive method
is sieving and centrifuging, where the nematodes will clump at the bottom after the
centrifugation (dead or alive)
Which is the correct order of egg layer development? - Answers vitelline, chitin, lipid
This egg layer provides structural strength. - Answers Chitin
This egg layer is impermeable. - Answers Lipid
Can nematodes see light? - Answers They have sensory structures although they do not have
eyes like humans and other mammals. The structures enhance the nematode's awareness to
the environment around them, so they don't require eyes to see light.
order the three steps of nematode molting - Answers apolysis,
formation of new cuticle,
ecdysis
order the steps of nematode hatching - Answers juvenile movement, enzymatic breakdown of
eggshell,
change in egg permeability.
Which is the correct order of nematode cuticle parts from internal to external? - Answers
epidermis, basal, median, cortical, epicuticle
Match the nematode body orientation with the correct features - Answers Dorsal --> teeth
Ventral --> Vulva, Anus
Lateral --> Amphids
In nematodes, neuromuscular process are sent out to the nerve. T or F - Answers True
The predominant neurotransmitter in nematodes is: - Answers ACh
The ____________ is responsible for worm architecture - Answers Epidermis
