Which of the following is a characteristic of vertebrates a) an inner skeleton made of bone or cartilage b) stinging cells c) a hard exoskeleton made of chitin harder outer shell

What is an animal that lives by preying on other animals

The human genome project is devoted to mapping the general dna sequence of our species. this could lead to the development of new medicines, as well as the possibility of using gene therapy to treat certain diseases. however, there are some ethical issues surrounding the mapping of individual genomes. one concern is a) that your genes may change over time, making the project useless. b) that insurance companies could discriminate based on genetic make-up. c) that since this has never been done before, we should probably not do it now. d) that sequencing our individual genomes is so expensive, it is a counter-productive strategy.

Drag each tile to the correct box. arrange the layers and faults from oldest to youngest.