The diagram shows structures that form the surface of the trachea. Which level of organisation is the structure labelled S?
A. Cell
B. Organ C. Organ system
D. Tissue

The eruption of a nearby volcano causes a prairie ecosystem to receive a lot less sunlight.which of these is the most likely effect on the ecosystem? a-an increase in biodiversity. b-an increase in immigration to the area. c-a decrease in available water. d-a decrease in plant growth.

Select the correct answer.which scenario describes unethical lab behavior? o a. danny stores the chemicals required for his experiment in flasks and beakers.b.anna publishes the results of her experiment on the growth rate of saplings.c.jason repeatedly runs an experiment until he gets the results he desires.d. mia records her observations of an experiment precisely and accurately.

19. scientists use meteorites that hit earth to provide evidence of the composition of earth's interior because they hypothesize that