Which sentences describe the discipline of the natural science

Which of the following statements is most likely correct about a rock belonging to the jurassic age and a rock belonging to the cambrian age? options: 1) they have identical fossils of organisms that have evolved over time. 2) both have animal fossils preserved in them due to weathering and erosion. 3) they contain different fossils because life on earth has changed through time. 4) the fossils in them were formed on the surface of earth due to exposure to sunlight.

Give examples of selective advantage of organism’s body part/organ

Identify two examples of chemical reactions that you have encountered during the last week. identify an exothermic and endothermic reaction. explain.