The following image shows the hardened impression of a dinosaur's footprint. What type of fossil is this? An image showing the hardened impression of a dinosaur's footprint in mud.

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Question 8 options:

Crystallization

Trace

Cast

Petrification

Name the following: (a) category of pathogen that causes diseases, like common cold and mumps. (b) the microorganism that requires a host to produce.

Cattle with brown fur and cattle with white fur will produce a reddish roan calf . when examined closely, the calf show about an even number of brown hairs and white hairs that give a reddish appearance when viewed from far away. the fact that both the brown fur allele and the white fur allele are expressed equally in the offspring is an example of

Explain how paleontologists use trilobite fossils as index fossils for various geologic time periods.