Which organelle is this? a small, round cell structure containing chemicals that break down large food particles into smaller ones. they are the custodians or recycling crew of the cell.

The embryos of a bird, a reptile, and a mammal are similar in appearance. how does comparing the physical appearance of embryos of different species support the theory of evolution? a. it shows that these organisms share a common ancestor. b. it provides evidence that these organisms eat the same foods.c. it shows that these organisms share the same habitat.d. it provides evidence that these organisms suffered a genetic mutation.

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How do scientists hope to use the human genome project as an early warning system