Please help my cousin please its urgent Which of these are characteristics of a scientific law? Check all that apply.

It contains an explanation of facts.
It states a fact about how nature works.
It is based on observations of nature.
It often changes over time with new experiments and technology.
It explains why a group of hypotheses are related.
It will most likely remain true even when scientists work with new experiments.

The body is protected against harmful flu viruses by

The observations of hooke and van leeuwenhoek documenting the existence of microscopic cells formed the basis of what important theory? a. the cell theory stating that all living things are composed of cellsb. the theory of spontaneous generation, which held that life forms could arise spontaneouslyc. the theory of chemotherapy, or use of antimicrobials to destroy pathogenic organismsd. the germ theory of disease and causative agents

What are the possible blood types among the children of parents that are ab and ii? oa) types a and b ob) types a, b, and ab c) types a, b, and o od) types a, b, ab, and o