i think the answer is either A or D but im strongly going to go with D
Answer:
Cell-mediated immunity develops through a network of interactions that results in defense against microorganisms that survive within phagocytes or other cells. The response is initiated by the recognition of intracellular microorganism antigen by T cells through the histocompatibility complex. In the CD8 response, only the target cell carrying the class I associated antigen can be lysed or induced to apoptosis. In another mechanism of the cellular response, CD4 + Th1 T cells activate, for example, cytokine-infected macrophages such as IFN. When a pathogen resists the effects of activated macrophages, chronic infection may develop.
The hormonal immunity response leads to the destruction of extracellular microorganisms and prevents or decreases the spread of intracellular cells by neutralizing, opsonizing and activating the complement system.
Photosynthesis takes place in B. In chloroplasts because that's where the plant's green color is produced.
The accumulation of several mutations in the main gene on the virus's surface may be able to give H7N9 the ability to spread like human flu viruses do, passing from person to person through coughing and sneezing.
Answer:
Absorption is the process of absorbing nutrients in the form of molecules into the blood. Therefore, this is the key difference between digestion and absorption. Digestion starts in the mouth while absorption starts in the stomach. Moreover, digestion occurs from mouth to intestine while absorption mostly occurs from the stomach to intestine.
Explanation:
