What is an example of a host in an ecosystem?

Which of the four major uses is predicted to change the least by 2020?

Scientific method and data analysisa biology student wanted to determine if there is a relationship between resting heart rate and bodyheight. she gathered information from 12 classmates and constructed the table below.resting heart rate (beats per minute)student height (cm)155. 156156165180180190194195

The first generation of offspring from the cross of two parents is called the a.f1 generation b.f2 generation c.short generation d.p generation