As we know the immune system is a complex of cells, tissues, and organs working together to avoid disease, now there are several types of defense, the most simple and first to act are physical barriers like skin or hairs, this stop physically the advance of pathogens, therefore we can say that the correct answer is option C.
Answer:
A
Explanation:
Radioactive dating uses carbon isotopes to determine the age of a material.
The reactions of the Calvin cycle add carbon (from carbon dioxide in the atmosphere) to a simple five-carbon molecule called RuBP These reactions use chemical energy from NADPH and ATP that were produced in the light reactions The final product of the Calvin cycle is glucose
Answer and Explanation:
The femoral biceps is one of the hamstrings. These muscles are located in the back of the thigh and are the most important knee flexors.
In addition, the biceps have the ability to extend the thigh over the pelvis and rotate the hip laterally. This is because it has a muscular belly that originates from the hip, more precisely in the ischial tuberosity of the ischium.
When the biceps are contracted, its most important function is to contract the knee, but if it remains rigid its function will be mainly the extension of the thigh.
