Identify two universial laws

(99 points) be serious! how do farts work? how do you fart without it stinking? serious answers only

The fruit of a certain plant is sweet and fleshy. the seeds of this plant have a seed coat that is fairly tough. the seeds germinate better if they are exposed to acid, or scarification. what is the most likely type of dispersal for this seed? water animal wind

During convection, less dense fluid rises and denser fluid sinks.