Answer:
Explanation:
Viruses are classified in several ways: by factors such as their core content, the structure of their capsids, and whether they have an outer envelope. Viruses may use either DNA or RNA as their genetic material. The virus core contains the genome or total genetic content of the virus.
Answer:
T cells and B cells
Explanation:
It is characterized by specificity, immunological memory, and self/nonself recognition. The response involves clonal selection of lymphocytes that respond to a specific antigen. T cells and B cells are the two major components of adaptive immunity.
From the list provided the eco-friendly activities are recycling materials, growing trees, burying organic matter and using fewer disposables. Recycling materials ensures that less refuse is available to become trash. Planting trees prevents and remedies soil erosion. Using fewer disposables ensures that less refuse enters the environment. Filling landfills, cutting trees and burning fossil fuels are all non eco-friendly practices.
