Egg laying land animals have evolved worries eggs with tough Shelton sure that A. External fertilization getting please
B. The egg and the sperm can fuse
C. Parental care is a necessary
D. The developing embryo does not dry out

Cobalt-60 is an artificial radioisotope that is produced in a nuclear reactor and is used as a gamma-ray source in the treatment of certain types of cancer. if the wavelength of the gamma radiation from a cobalt-60 source is 1.00 × 10-3 nm, calculate the energy of a photon of this radiation.

What type of matter is made of only one kind of atom

How does the viscosity of magma change as magma cools?