The nucleus of an atom is where the protons and neutrons are. The electrons circle around the nucleus.
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Option B, solids, liquids, and gases, is the right answer.
The soil is a three-element arrangement composed of solid (rocks crystals and hummus), liquid ( air and water) and gas (nitrogen and oxygen). In addition to abiotic factors soil also contains living organisms such as bacteria and protozoa. In the context of Biology, the soil has a significant value, as it is believed that soil is basis of basic ecosystem function
Frequency is the vegetation attribute that describes the probability of finding a species within a particular area. ... Therefore, data collection is usually a more rapid procedure than for other vegetation attributes such as biomass, cover, or density, which involve counting or subjective quantification.
Answer: Medication can be tested on the cancer culture before being injected into the patient.
