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Questions and Answers
Name three different physical traits that are used in the shark dichotomous key.
Name three different physical traits that are used in the shark dichotomous key.
Flattened body, mouth at the front of the head, long sawlike projection from snout.
Do all the sharks you will try to identify belong to the same genus? Explain your answer.
Do all the sharks you will try to identify belong to the same genus? Explain your answer.
No, some sharks could also just look similar, or be the same species.
After you make a list of physical traits that you can use in your dichotomous key, how will you decide which trait to pick for the first step?
After you make a list of physical traits that you can use in your dichotomous key, how will you decide which trait to pick for the first step?
A trait that all the rest of the species doesn't have, such as pink feet vs black feet.
What is the scientific name of Shark A?
What is the scientific name of Shark A?
What is the scientific name of Shark B?
What is the scientific name of Shark B?
What is the scientific name of Shark C?
What is the scientific name of Shark C?
What is the scientific name of Shark D?
What is the scientific name of Shark D?
What is the scientific name of Shark E?
What is the scientific name of Shark E?
What is the scientific name of Shark F?
What is the scientific name of Shark F?
How would the dichotomous key for sharks need to change if you wanted to use it to identify 10 different sharks?
How would the dichotomous key for sharks need to change if you wanted to use it to identify 10 different sharks?
Where can I find more biology and math answers?
Where can I find more biology and math answers?
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Study Notes
Physical Traits in Shark Dichotomous Keys
- Common traits include flattened body shape, frontal mouth placement, and sawlike projections from the snout.
Shark Identification and Genus
- Not all sharks may belong to the same genus; similar appearances can occur within the same species or among different species.
Selecting Traits for Dichotomous Keys
- Choose distinctive traits for the first step in the key, such as contrasting foot colors (e.g., pink vs black feet) that differentiate species effectively.
Shark Species Identifications
- Rhincodon typus is identified as the Whale Shark.
- Carcharodon carcharias is recognized as the Great White Shark.
- Heterodontus francisci is known as the Horn Shark.
- Somniosus microcephalus is the Greenland Shark.
- Sphyrna zygaena is referred to as the Smooth Hammerhead.
- Squatina squatina is called the Angel Shark.
Adjusting the Dichotomous Key for More Species
- To identify additional sharks, the key must be extended with more specific details, including adaptations like color, weight, fin shape, and body part locations.
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