Why does a rattlesnake open its mouth before it even strikes?

What will be an ideal response?


If a rattlesnake has the intention to bite a large animal, it first unhinges its jaw so that it can engulf an
animal larger than its head.

Biology & Microbiology

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Atmospheric sulfur dioxide returns to Earth in rain as weak sulfuric acid

Indicate whether the statement is true or false

Biology & Microbiology

A host provides the means of reproduction for these acellular forms. 

A. Plantae B. Fungi C. Algae D. Viruses

Biology & Microbiology

Which of the following is a type of cytopathic effect?

A. inclusions in the nucleus B. rounding of cells C. inclusions in the cytoplasm D. multinucleated giant cells E. All of these choices are correct.

Biology & Microbiology

Horses and donkeys mate successfully to produce mules, which are always sterile. Which genetic isolating mechanism is involved here to prevent horses and donkeys from becoming a single species?

A) gametic isolation B) hybrid infertility C) behavioral isolation D) mechanical isolation

Biology & Microbiology