Which of the following structures would be the least likely to fossilize?
1. shells of clams and snails
2. skin
3. bones
4. teeth

Explain the source of radioactivity in uranium in earth’s crust by which it produces nuclear radiation

How is the carbon cycle related to global warming ?

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