Which one of the following is not true concerning cathode rays?
A) They originate from the negative electrode.
B) They travel in straight lines in the absence of electric or magnetic fields.
C) They impart a negative charge to metals exposed to them.
D) They are made up of electrons.
E) The characteristics of cathode rays depend on the material from which they are emitted.
Question 2
The study of the effects of poisons, their detection and identification and their antidotes is known as
A) alkaloidism.
B) carcinogenic testing.
C) berylliosis.
D) toxicology.
True-color image of layers of haze in Titan's atmosphere.
Parallel Light Rays from Distant Objects
Adapoids and omomyoids had longer snouts and are the first “true” primates.
Which of the following statements is true of linkage?
Anterosuperior view of true pelvis (blue)
Diffusion of sun rays