The Mass Extinction Event at the End of the Cretaceous

question 29

Short Answer

The mass extinction event at the end of the Cretaceous period is thought to have been caused by the impact of a ________.

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Definitions:

Cystic Fibrosis

is a genetic disorder that affects the lungs and digestive system, leading to severe respiratory and nutritional difficulties.

Respiratory Infections

Infections that affect the lungs, throat, airways, or sinuses, often leading to respiratory distress or illness.

Hereditary Abnormality

A deformity or disease passed down from parents to offspring through genes, manifesting at birth or later in life.

Sperm

Male reproductive cells or gametes in sexually reproducing organisms that merge with the female gamete, or ova, in the process known as fertilization.