Based on the information in "edward jenner and the history of smallpox and vaccination,��� which sentence best explains how the twentieth century is significant in the historical timeline of smallpox? it represents an improvement of the vaccination. it represents a decrease in disease mortality. it represents a need for revaccination. it represents the end of the disease.

Explain how earth is like a giant bar magnet. how is our magnetic field made?

Tortoise shells and snail shells are similar in function: they protect the organism from predators. based on a comparison of the organisms in the images, what can you conclude? 1. tortoises and snails have homologous organs, and they’re evolutionarily related. 2. tortoises and snails have homologous organs, and they belong to same species. 3. tortoises and snails have analogous organs, and they belong to the same species. 4. tortoises and snails have analogous organs, and they don’t belong to the same species. 5. tortoises and snails have analogous organs, and they aren’t evolutionarily related.

In 1919, the temperance movement finally succeeded. they secured ratification of a constitutional amendment (the that banned alcoholic beverages. prohibition began with the 1920 passage of the which enforced the amendment.