What mineral's presence in large amounts causes magma to be viscous/sticky, hard for gasbubbles to escape, and explosive eruptions?

A: Tourmaline
B: Iron
C: Silica
D: Magnesium

Write a paragraph at least 5 sentences “why all vaccinations should be mandatory”

Which is a function of vascular tissue? a. to perform photosynthesis b. to transport water and nutrients c. to absorb minerals and sugar d. to interact with soil fungi

Which of the following is a true statement? question 8 options: populations can't evolve, only individual organisms. individuals have adaptations that can change over time. individuals have traits that may or may not make them successful at reproduction. individuals evolve to have adaptations.