Easy:
The four chambers of the heart are the right and left atria, and the right and left ventricles. The main veins connected the heart are the superior and inferior vena cava, the main artery is the Aorta.
The first chamber, (the right atruim) recieves deoxygenated blood and forces it into the right ventricles which forces the blood into the lungs for oxygenation. Then the blood reenters the heart in the left atrium, which forces the blood into the left ventricle and then out the Aorta to the rest of the body.
sorry, but this question needed kind of a long answer to be answered correctly.
According to finding of scientist, the earth is roughly 4,600 million years old. then the non abundant fossil that they dated was about 3,600 million years old. so the fraction or percent of <span>geologic time is :
3,600 / 4600 = 0.78 or 78 % of earth geologic time</span>
Answer:
B. Ligase
Explanation:
Ligase is the class of enzyme that catalyzes the joining/linking of two large molecules. This involves the formation of a new chemical bond between the molecules.
DNA ligase is an example of a ligase. It catalyzes the linking of DNA strands through the formation of a phosphodiester bond. DNA ligase can either link two complementary fragments of DNA or repair the breakage of single stranded DNA that occurs as a result of replication of double stranded DNA.
Answer:
They provide structure for the body, take in nutrients from food, convert those nutrients into energy, and carry out specialized functions. Cells also contain the body's hereditary material and can make copies of themselves. Cells have many parts, each with a different function.
Explanation: