What type of bacteria live in the roots of legumes? a)nitrogen fixing bacteria b)pathogenic bacteria c)aerobic bacteria d)rickettsia

Which organism is the producer in this food web? 7th grade question. a) arthropods b) birds c) fungi d) plants

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

What is thought to have caused the mass extinction at the end of the cretaceous period?