An engineer is designing an implant to help people with spinal issues. The engineer is performing a cost-benefit analysis of his implant. Which of these would be a cost? Choose the correct answer. Group of answer choices

The implant has a long lifespan in the human body.

The implant is effective in treating a spinal issue.

The implant is made from a rare metal that is difficult to mine.

The implant is very small and can be implanted easily by a surgeon.

Sweating and breathing is an example of differentiation specialization maintaining homeostasis metabolism

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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.