Many wild orchids cannot be successfully dug up and transplanted because they need the native mycorrhizae (a fungus) in the soil to survive. what kind of interaction is this? view available hint(s)

This is a mutualistas relationship. Mycorrhizae is a fungus that increase the surface area of plants to absorb water and nutrients from the soil.

True statement gravity force is more on bigger mass, less on smaller mass.all mass fall on planet with same acceleration and speeds

The answer is atmosphere. there are four spheres of the earth: 1. geosphere (from greek word 'geo' = ground), 2. hydrosphere (from greek word 'hydro' = water), 3. biosphere (from greek word 'bio' = life), and 4. atmosphere (from greek word 'atmo' = air). a magnetosphere is a region of space around astronomical objects controlled by the magnetic field of that object. through the process of elimination, since lightning is present in the air, it can be found in the atmosphere.