Where in the body does fertilization usually occur

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

Based on the topographic map of mt. st. helens, what is the contour interval of the volcano about height is 2,950 m?

Which kingdom includes some organisms that have no nucleus and can live in an environment with an extremely high salt content