The answer is C. Hope i could help
Answer:
d. A purine base forms hydrogen bonds to pair with a pyrimidine base located on the opposite DNA strand. Specifically, A pairs with T, and C pairs with G.
Explanation:
Answer: Fighting infection
Explanation:
Lymphatic system is a type of circulatory system in all vertebrates. It is a network of tissues ,blood vessels, and organs. The primary function of the lymphatic system is to control the fluid balance by collecting the fluid present in excess from the tissues and depositing them in the stream of blood. The secondary function of the lymph system is the production of lymphocytes (white blood cells) which fights against the disease causing pathogens. Hence, fights against infection.
The answer is <span>c. The relationship between the bacteria and the ticks is commensalism, and the relationship between the ticks and the humans is parasitism.</span>
Commensalism is a relationship between two organisms in which only one of them has benefit, and the other one is not affected. Bacteria are carried by ticks, so bacteria have a benefit from the relationship. Tick is not affected by bacteria, it does not get Lyme disease. Therefore, the relationship between ticks and bacteria is commensalism.
The relationship between ticks and humans is parasitism. Parasitism is non-mutual relationship between two organisms in which one of them (tick) benefits at the expense of the host organism (human).
