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According to the evidence, which is the most probable ancestral area of Rattlesnake ?

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U.S.
Mexico
Canada
Australia


Evidence has been collected to show the most probable ancestral area of rattlesnakes is the Sierra Madre Occidental region in Mexico.

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What is the family name of Rattlesnake ?

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Serpentes
Squamata
Viperidae
Chordata


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What is the main prey of Rattlesnake ?

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Birds
Rodent
Birds and Rodent
Insect


Rattlesnakes are predators who live in a wide array of habitats, hunting small animals such as birds and rodents.

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Who is/are the main predator of Rattlesnake ?

Human
Elephant
Tiger
Lion


Rattlesnakes are heavily preyed upon as neonates, while they are still weak and mentally immature. Very large numbers of rattlesnakes are killed by humans.

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Rattlesnake venom is a mixture of how many enzymes ?

1 to 2
5 to 10
17 to 24
5 to 15


Rattlesnake venom is a mixture of 5-15 enzymes, various metal ions, biogenic amines, lipids, free amino acids, proteins, and polypeptides.

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For how much time, the Rattlesnake venom remains stable ?

Many years
Two years
One year
5 years


The venom is very stable, and retains its toxicity for many years in storage.

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How much percent bites of Rattlesnake are dry ?

0.1
0.25
0.35
0.5


About 25 percent of the bites are “dry,” meaning no venom was injected, but the bites still require medical treatment.

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Rattlesnake venom ducts are located at

2 cm inside tail top
Tail tip
Lower jaw
Upper jaw


attlesnake fangs are connected by venom ducts to large poison glands near the outer edge of the upper jaw, towards the rear of the head.

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Rattlesnakes have a ______ tongue that they flick up and down. Fill in the blank.

Pointed
Forked
Pinned
Curved


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Rattlesnakes pick up vibrations through their ________

Tongue
Ears
Body muscles
Eyes


Rattlesnakes pick up vibrations through their body muscles which send sound through to their jaw bones and on to their inner ear organs.

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