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WorksheetsHSC
Total questions: 35
Worksheet time: 15mins
Which of the following is the closest relative to the horseshoe crab?
blue crab
spider
oyster
fiddler crab
What part of the horseshoe crab is used by humans?
Blood
Shell
Telson
Legs
Which of the following is NOT true?
Horseshoe have gills called book gills
Horseshoe crabs only have one baby at a time
Horseshoe crabs swim upside down
Horseshoe crabs live during the time of the dinosaurs
Telson is used to ______.
carry their eggs
flip itself over
swim
fight other predators
Their life span is ______.
50 years
10 years
20 years
5 years
In males, the first claw is shaped like a ________.
hook
hand
pincer
circle
Their eggs hatch in ______.
1 month
1 week
6 months
2 weeks
what color is their blood?
red
orange
black
blue
What is a Horseshoe Crab?
A crab that looks like a horseshoe.
A horseshoe crab looking crustacean.
A HSC is closely related to arachnids and part of the arthropod family.
A crustacean that crawls along the floor of the bay or ocean.
How long have HSC's been on the Earth?
100 million years
200 million years
300 million years
400+ million years
What are some adaptations that a HSC has that has helped its species live so long?
Cool personality and like-able looks.
Ability to swim upside down and eat upside down.
Numerous eyes, hard shells, special appendages, and exceptional blood.
Ability to eat small worms, crustaceans, and mollusks.
How many eyes/sensors do HSC's have?
1-3
4-7
8-9
10+
What are Book Gills?
Gills used by the HSC to breathe.
Gills used by the HSC to navigate.
Gills used by the HSC to tell which direction is up.
Gills used by the HSC to eat.
A HSC's Compound Eyes have:
nearly 100 facets in the adult limulus.
nearly 250 facets in the adult limulus.
nearly 500 facets in the adult limulus.
nearly 1000 facets in the adult limulus.
How many simple eyes does a HSC have?
2
3
4
5
What is the carapace?
Hard protective outer shell shaped like a horseshoe.
The male claws that attach to the female.
The female claws that help dig into the sand.
The walking legs of the HRS.
What is the Telson?
The front male claws.
The female claws.
The tail that helps flip the HSC.
The tail that is used as a weapon.
What are the pedipalps?
Female pincers used to dig.
Male pincers used to hang onto the female.
Breathing gills used to filter air out of water.
The tail of the HSC used to flip over.
What are the chelicera used for?
To attach to the female.
To dig into the sand.
To break food and guide the food into the mouth.
To guide the HSC through the water.
HSC blood is:
Iron based
Copper based
Magnesium based
Sodium based
HSC blood is what color?
Blue
Green
Red
Yellow
Other animals that have blue blood (copper based)
Cats
Dogs
Humans
Arachnids
How old do female HSC's have to reach before they can lay eggs?
2 years old
5 years old
10 years old
20 years old
How many eggs can a female HSC lay in a season?
1000-2000
10,000-20,000
30,000-50,000
60,000-120,000+
How many eggs, on average survive to adult hood?
100 per HSC female per season
1000 per HSC female per season
1 per HSC female per season
10 per HSC female per season
HSC's are omnivorous.
True
False
HSC's prefer to eat
Fish
Worms
Other HSC's
Octopus
HSC's have gizzards like birds to help digest their food.
True
False
Plankton is a
Animal
Plant
Zooplankton is a
Plant
Animal
The arrow in a food chain/web shows
Connects the organism to each-other
The direction of the attack
The flow of energy
Doesn't mean anything
A primary producer
produces carbon dioxide and takes in oxygen
eats other carnivores
eats plants and animals to survive
uses sunlight to start photosyntheses to make starch and sugar
Horseshoe crabs nest during
neap tides during September and October
new and full moons in May and June
low tides in the summer
low tides during the spring
Shorebirds need the HSC eggs to gain enough weight to make it to the Arctict and lay eggs.
True
False
