Scientists estimate that there may be up to ____________ species alive today.a. 30 billion
b. 30 million
c. 1.9 million
d. 1.9 billion

Synthesis of one protein cannot take place without the presence of another protein." Is this statement true or false and why

what would most likely happen to cells placed in fresh water. Would water flow out of them because they are hypertonic to the external environment.

Investigators are studying a signaling pathway in which an RTK activates the monomeric GTPase Ras.a. True
b. False

Question 4 DNA replication of a single DNA molecule is referred to as semiconservative because


A.
all the DNA strands in the two DNA molecules will have both parental and newly synthesized DNA.

B.
it results in two nonidentical DNA molecules.

C.
each of the two DNA molecules will consist of one parental strand and one newly synthesized strand.

D.
of the two DNA molecules, one is made up totally of parental DNA, while the other is entirely newly synthesized DNA.

E.
one DNA strand is replicated continuously, while the other must be replicated discontinuously.

The moon outside is very large, but you cannot see all of it. The calendar shows that the moon was invisible just less than two weeks ago. What phase is the moon in now?

Herbivores, carnivores, and omnivores help make up food chains.TRUE
FALSE - only herbivores and carnivores do
FALSE - only carnivores do
FALSE- only herbivores and omnivores do