The extinction event that took place about 65 million years ago wiped out about one-half of all animals on earth. which of the following were not wiped out by this event?

ammonites

marine plankton

non-avian dinosaurs

avian dinosaurs

Avian dinosaurs

Explanation:

Avian dinosaurs are the only dinosaurs that survived the lethal meteor that created the Chicxulub crater on the Yucatan Peninsula, Mexico. Although the name "dinosaur" was coined from Greek, meaning something like "terrible lizard" or rather "frighteningly large lizard", avian dinosaurs were not lizards. They were quite diverse, and included a group of feathered animals, the ancestors of modern birds.

According to the authors of the study led by Canadian paleontologist Derek Larson, shortly after the meteor impact  marking the end of the Cretaceous geological period, terrestrial food chains relying on plant photosynthesis would have collapsed. Without plants, herbivores that eat them do not survive; Without herbivores, there is no food for carnivores. The avian dinosaurs included carnivores with teeth in their beaks, which also became extinct due to massive ecological change. Already their toothless colleagues were able to survive by eating seeds.

weathering - colorado river carves land in arizona to form the grand canyon. cracks form in a sandstone wall surrounding a house. a marble statue near the science museum is changing color due to rainfall

erosion - after a rainstorm, soil and rock piees litter the roadways. the sand dunes in the sahara desert are changing shape.

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