Lithium has 3 electrons. why do 2 electrons go in the first shell, and one in the second?
question 2 options:

a. the electrons go randomly into shells

b. the first shell only holds 2 electrons so the 3rd electron had to go in the second shell

c. all the electrons could go into the second shell.

d. the shells appear and disappear so the electrons go anywhere

Make a claim about the factors that cause inherited genetic variations within populations. also make a claim about the effects of mutations.

Imagine a person stepping on a pin and pulling his or her foot away. look at the reflex arc of this scenario below. which statement best describes the image? a)the sensory nerve carries the signal from the effector to the interneuron, and the motor neuron carries the signal to the receptor. b)the motor nerve carries the signal from the receptor to the interneuron, and the sensory neuron carries the signal to the effector. c)the sensory nerve carries the signal from the receptor to the interneuron, and the motor neuron carries the signal to the effector. d)the sensory nerve carries the signal from the receptor to the motor neuron, and the interneuron carries the signal to the effector.

Plants transfer carbon in the carbon cycle a. through assimilation of carbon from the soil. b. when carbon transpires from their stomatae. c. when they are eaten by animals. d. through fixation of carbon in the soil.plants transfer carbon in the carbon cycle a. through assimilation of carbon from the soil. b. when carbon transpires from their stomatae. c. when they are eaten by animals. d. through fixation of carbon in the soil.