Zirconium has an atomic number of 40 and an atomic mass of 91. How many neutrons does it have?

In a plant, a tall variety was crossed with a dwarf variety. All F1 plants were tall. When F1 x F1 plants were interbred, 9/16 of the F2 were tall and 7/16 were dwarf.

If a kitchen washcloth harbors microbes that can be transmitted to an individual to cause disease, then the washcloth is considered A. a pathogen B. a biofilm C. a virus D. an endospore E. a fomite

At which level of an energy Pyramid is the least amount of energy is lost in the environment

What is the name for the new field of study that focuses on the relationship among the brain, immune system, and psychological factors with regard to stress-related events?

24. In an energy pyramid, the bottom level represents: A. primary consumers B. producers C. scavengers D. decomposers E. secondary consumers

How can you tell if someone is heterozygous or homozygous for a trait that is dominant

What category of microorganism would a diatom fall into?

You can locate regions of low wind speed on a weather map by locating

Name 3 factors which can speed up diffusion and osmosis

What is a classification division