Why is no-till farming more sustainable than many traditional methods of
farming?

A. It increases soil erosion.

B. It increases land pollution.

C. It reduces land pollution.

D. It reduces soil erosion.

Which entry is in the wrong position in the table?

Diagram of the evolution of land plants?

The images show two species of tree frogs in a particular region. the gray tree frogs are adapted to the trees of the woodlands, while the green tree frogs can survive in woodlands or grasslands. the gray frog was abundant in the woodlands. because of climatic changes, most of the trees in the region died, and the woodlands changed to grasslands. in such a case, the . the gray tree frog is closely related to the green tree frog genetically, but they have different mating calls. this suggests that speciation occurred because of .