Answer:
Phototropism is an important light response in plants. Positive Phototropism leans towards the light and negative Phototropism growth away from the light.
Explanation:
Answer:
Adaptation affects the diversity of an ecosystem by helping organisms survive different harsh conditions as well as survive their environment.
Explanation:
T cell receptor, Cytotoxic T Cell, CD4, Antigen, Bacterium,
B – cell, Cell mediated response, Class II MHC, Cytokines, and Humoral Response
are the components for the activation of a helper t cell by a dendritic cell.
"Answer DThe outermost layer of old epidermal cells are sloughed off and replaced every 15 to 30 days. The sebaceous glands secrete sebum which maintains the skin pH between 3 and 5. Bacteria which metabolize sebum live as opportunistic pathogens on the skin and cause skin infections."
