Answer;
-Pumps require energy for transport because they move material against an electrochemical gradient, but channels and carriers do not use energy because they only facilitate diffusion down a molecule's or ion's electrochemical gradient.
Explanation;
-Permeability is conferred by two classes of membrane proteins, pumps and channels. Pumps use a source of free energy such as ATP or light to drive the thermodynamically uphill transport of ions or molecules. Pump action is an example of active transport.
-Channels, in contrast, enable ions to flow rapidly through membranes in a downhill direction. Channel action illustrates passive transport, or facilitated diffusion.
The gene that controls production of white blood cells.
A filter is a device that can reduce particulate in gaseous emissions from mobile exhausts. Specifically known as diesel particulate filter (DPF) removes soot from gasses of the diesel engine through the exhaust. It significantly reduces the amount of pollutants present in the air.
Answer:
Carbon dioxide levels are currently miuch higher than normal.
Explanation:
The graph shows that there has been a peak of CO2 in the atmosphere in the past few years.
The best material to use is foam, since it is the best insulator. An insulator will help slow the
transfer of heat from outside of the lunchbox to inside of the lunchbox. The extra layer will be of foam.
Explanation:
If we compare the specific heat capacity of rubber and foam it can be found that foam has high specific heat capacity, which indicates that it is the good insulator.
An insulator is a substance in which heat exchange between medium and surrounding is very low.
Jayla and her grandma wanted their food to be cold all morning so foam as an insulator is the best choice.
Thus, high specific heat energy means large amount of energy required to raise the temperature by 1 degree in response to the mass of the substance as per unit mass.