. Which of these organisms are primary consumers? Birds, shrimp, worms
Mollusks, shrimp, fish
Mollusks, crab, birds
Mollusks, shrimp, worms

Assume that a student is given two different models of bacteria, with one model consisting of big bacteria and the other consisting of small bacteria. how can the student demonstate the theory of endosymbiosis using the models

One statements is an example of a scientific observation. another statement is an example of a scientific explanation. identify the correct statement for each category to illustrate how scientific explanations are inferred from scientific observations.

The body is protected against harmful flu viruses by