Where does the exchange of materials in and out of a cell take place?

A.

cell membrane

B.

nucleus

C.

chloroplast

D.

chromosome

A 1 ml sample of culture liquid contained 1000 viable bacterial cells. You serially diluted it twice, performing 10-fold or 1/10 dilutions into a final volume of 1 ml each time.

Explain why some traits cannot be easily changed even though they are heritable

Lysine is a monomer used to make a proteins. It is a

True or false: glucose, protein, glycerol, and long-chain fatty acids are absorbed from the small intestine directly into the bloodstream.

Not everyone can travel to a remote area of the world to protect a rare habitat, but there are choices each of us can make each day to reduce habitat destruction and slow the rate of species extinction.

Scientists say that conditions must be "just right" for a hurricane to start up. Which is the first step of "just right" in the development of a hurricane? A) Cool ocean water replaces warmer surface water.

What is another name for a tropical savanna?

What is a substance in plant sources that cannot be digested that is 5 letters

What would most likely cause the future acceleration of the expansion of the universe? O radiation from the Sun O the existence of background radiation O the continued existence of dark energy O light shifts identified by the Doppler effect

What came about in the devonian period