2. What​ ​is​ ​the​ ​main​ ​aim​ ​of​ ​the​ ​study​ ​of​ ​systematics? A. To​ ​calculate​ ​how​ ​many​ ​organisms​ ​there​ ​are​ ​on​ ​Earth
B. To​ ​understand​ ​the​ ​evolutionary​ ​relationship​ ​of​ ​biological​ ​organisms
C. To​ ​create​ ​a​ ​naming​ ​system​ ​for​ ​biological​ ​organisms
D. None​ ​of​ ​the​ ​above

Asample of silver (with work function ? = 4.52 ev) is exposed to an ultraviolet light source (? = 200 nm), which results in the ejection of photoelectrons. what changes will be observed if: silver is replaced with copper (? = 5.10 ev) more photoelectrons ejected no photoelectrons are emitted fewer photoelectrons ejected more energetic photoelectrons (on average) less energetic photoelectrons (on average)

What are the 4 phases of matter in order of increasing engery content?

Which of the following would not diffuse through the plasma membrane by means of simple diffusion? 1 oxygen 2 glucose 3 a steroid hormone 4 a lipid soluble vitamin