Which statements are true of a white dwarf?
a. it has a red shell.
b. it is the result of the core collapse of a low-mass star that sheds its outer layers.
c. it emits massive amounts of light compared with other stars.
d. it strongly attracts all matter or energy that comes near it.
e. it cools down to become a black dwarf.

Which statement about dna replication is true? a. eukaryotes only have one circular chromosome that unwinds at multiple locations. b. eukaryotes can only replicate one segment of a chromosome at a time. c. prokaryotes can only replicate their single circular chromosome in the nucleus. d. prokaryotes only have one origin of replication to initiate replication.

Why does the earth spin slowly, not faster? is it possible to prove it scientifically? can you prove it with math?

Which statement about relative potential energy of electrons is correct? a. an electron in the 2 p orbital of the second electron shell has more potential energy than an electron in the 2 s orbital of the second electron shell. b. an electron in the 2 p orbital of the second electron shell has more potential energy than an electron in the 3 p orbital of the third electron shell. c. an electron in the 3 p orbital of the third electron shell has more potential energy than an electron in the 2 p orbital of the second electron shell.