Answer:
Now the terms provided are required to be explained as according to the standard given OCR (oxford, Cambridge , and RSA examination). So for that we have the following definitions as given below:
Explanation:
<u>Cell-</u> A cell is the basic unit of life and all organisms are composed of one or more cells. There are two
fundamental types of cell: prokaryotic and eukaryotic.
<u>Exchange-</u> The gas exchange system is responsible for the uptake of oxygen into the blood and the excretion of carbon dioxide. Now exchange in organism mostly occur in gaseous form.
<u>Transport- </u>They occur in Both plants and animals so,
<u>Transport in an Animal body -</u>As animals become larger, more complex and more active, transport systems become essential to supply nutrients to, and remove waste from, individual cells.
<u>Transport in Plants body-</u> Transport systems in plants move substances from where they are absorbed or produced to where they are stored or used.
Plants do not have systems for transporting oxygen and carbon dioxide; instead these gases diffuse
through air spaces within stems, roots and leaves.
Is this for Driver's Ed? If so, here's my answer:
There is always a double-cross, or white x, sign before the crossing and/or a white x painted on the road to warn you of the upcoming railroad crossing.
If there are warning lights and/or arms at the crossing, you: turn off your radio and roll down the window to listen for the train. If the lights are flashing and/or the arms are down, a train is coming. If not, there is no train coming. You must stop before the white line, look both ways down the track. You are free to cross when the arms are all the way back up and there are no lights flashing AFTER you look both ways while listening for the train.
If there are no warning lights or arms at the crossing, you: stop before the white line, turn off the radio, and roll down the window to listen for a train. As you are stopped, you look both ways down the track. If you can't hear or see the train, you are free to cross. Make sure to keep at least 3 feet of distance between you and the track. However, to insure that nothing will come up and hit your car, you can always stop a good distance away from the white line, but still make sure you can see down the track.
This is very long-winded, but you can condense it.
Answer:
To help control the disease, letters were cleaned with vinegar before being sent. This did not work, because it was a false cause-and-effect relationship.Explanation:
