The correct option is C.
The heart is part of the cardiovascular system. The heart pump the blood round the body several times in a day. The blood is made up of several types of cells which carry out specific function in the body, these include the white blood cells which serves as soldiers of the body. The lymph refers to the fluid that circulate throughout the lymphatic system. Both the blood and the lymph are carried round the body by the cardiovascular system during the process of circulation.<span />
An organism is an animal with 5 levels of organization/
The correct option is D. Organisms work best at their optimum temperature and pH, above and below these temperature they will not be able to function as expected. It is possible that the students above use different temperature and pH when they were carrying out their experiments, this will result in different efficiency rate by the yeasts.
transfer of heat through electromagnetic waves
hope this helps
<span>It involves the use of oxygen and the release of carbon dioxide. Basically, when you breath in, the cells use the oxygen and transfer it through your body and the wasteful byproduct is the carbon dioxide that is released into the air back. Which is good because plants then use that and release oxygen.</span>