Which of the following is true for valence electrons?
a) valence electrons are always located in the innermost energy level
b) each element in the periodic table has a different number of valence electrons.
c) valence electrons may be lost or gained by an atom when bonding occurs with another atom
d) when atoms collide with other atoms, they bond automatically

In german cockroaches, curved wing (cv) is recessive to normal wing (cv+). bill, who is raising cockroaches in his dorm room, finds that the frequency of the gene for curved wings in his cockroach population is 0.6. in his friend joe’s apartment, the frequency of the gene for curved wings is 0.2. one day joe visits bill in his dorm room, and several cockroaches jump out of joe’s hair and join the population in bill’s room. bill estimates that, now, 10% of the cockroaches in his dorm room are individual roaches that jumped out of joe’s hair. what is the new frequency of curved wings among cockroaches in bill’s room? 0.69 0.4 0.5 0.31 0.20

Hey me with this one❤❤❤❤ every organism needs food. does a cell also need it? explain very briefly.

Si el equipo no fuera bueno no con el entrenador.