Astudent is designing a controlled experiment to test whether the amount of water that a plant receives affects its growth. which variable should the student change?

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.

Is there any species that went extinct in recent years due to natural causes (not caused by human interaction). if so, what caused it?

Speed is the ratio of the distance of an object moves to