B. atmosphere since the atmosphere is made up of o2, co2 (a greenhouse gas) and nitrogen. those are the primary elements
Answer:
Even though they are the same temperature, the metal will feel colder than the wood because of the thermal conductivity of the metal, compared to the wood. Metal is a good conductor of heat, hence it sends away the heat. On the other hand, wood is a poor conductor of heat, hence releases the heat too slowly.
Answer:
salt water and fresh water
Explanation:
The estuaries are located on the contact between a fresh water body and saline water body, or rather a place where a river enters the sea. Because of this, the estuaries have a mixture of saline water and fresh water. They are also shallow and warm. The sunlight penetrates to their bottom, and they are rich in nutrients. This results in the estuaries to offer several different living conditions, so there are lot of different species living in them.
Answer:
B
Explanation:
We know that the AmpR gene region has been interrupted. So this means the AmpR gene will not function in the recombinant DNA.
But the question tells us that the TetR gene is not interrupted, so the TetR gene will still function.
AmpR represses the protein that confers resistance to ampicillin, and AmpR is no longer functional, <u>so the new bacterial cells will be resistant to ampicillin.</u>
TetR represses the protein that causes resistance to tetracyline, and TetR is still functional, <u>so the new bacterial cells will not be resistant to tetracycline. </u>
This means B, there will be <u>growth on ampicillin but not tetracycline containing media.</u>