30 Questions
What is the process through which hookworm larvae enter the host?
Penetrating unbroken skin
How many times do hookworm larvae moult before becoming infective?
Two times
Which animals can be infected by Ancylostoma duodenale, aside from humans?
Cats and dogs
Where does a gravid female pinworm lay her eggs?
Around the anus
How does the pinworm life cycle begin?
With ingestion of eggs
Under what conditions do hookworm larvae hatch in 1 to 2 days?
Moisture, warmth, and shade
Where do adult female pinworms deposit eggs?
On the skin of the perianal area
How long can eggs of pinworms survive in the perianal regions?
3 weeks
Where do male and female pinworms usually mate?
In the ileum
How many times do pinworm larvae molt before becoming adults?
Twice
Which part of the body do gravid female pinworms migrate outside of during the night?
Skin of the perianal area
What is the average lifespan of adult male pinworms?
5 to 7 weeks
What type of circulatory system do cephalopods have?
Closed circulatory system
How many pairs of main nerve cords do molluscs typically have?
Two pairs
What do all molluscs have in common in terms of sensory capabilities?
Capabilities to detect chemicals, vibrations, and touch
How do some molluscs reproduce?
Using internal fertilization as hermaphrodites
What feature distinguishes Class Monoplacophora within Phylum Mollusca?
Distinct pseudometamerism of repeated organs
How do snails reproduce compared to marine snails like the apple snail?
Marine snails reproduce internally while land snails reproduce externally
What is the English name for the mollusc known as 'chiton'?
Polyplacophora
Where do chitons primarily live?
Intertidal and subtidal zones
How many nephridia do chitons typically have?
Six
What is the meaning of 'Polyplacophora' in Greek?
Many tablets bearing
How do chitons protect themselves?
By having a dorsal shell composed of eight separate shell plates
Which class of molluscs includes chitons?
Polyplacophora
What is the main organ used for respiration in most molluscs?
Pallial lung
How do molluscs with radula use it in feeding?
To scrape bacteria and algae off rocks
What organ in molluscs collects fluids from the coelom for excretion?
Nephridia
Which of the following is true about the circulatory system of most molluscs?
Blood is released into tissue spaces
What is the function of labial palps in bivalves' feeding process?
Collect detritus from mucus
What type of symmetry do molluscs exhibit?
Bilateral symmetry
Test your knowledge on the lifecycle of Ancylostoma duodenale, a parasitic worm that attaches to the intestine and feeds on blood and tissue. Learn about the different stages of development and how it infects hosts.
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