Alarge greenhouse has developed a new plant. they are interested in how the plant grows under different conditions. your task is to design an experiment to test the plant growth taking into consideration 2 brands of fertilizer (easygro and supergro), 3 levels of soil acidity (high, moderate, and low), and location (indoors or outdoors). there are 120 plants available for the experiment.

the tricuspid valve is present between right atrium and right ventricle

on island x the species needed to adapt because they were being subject to predators which didn't inhabit island y.  

the earth is thought to have been formed about 4.6 billion years ago by collisions from a cloud of hydrogen, helium, rock, ice and other materials. these were pulled together by gravity to form objects in and around earth like- asteroids and small early planets called planetesimals.

so, the best possible answer to this question will be option d- to harden materials to form different parts of earth’s layers