Admission Tests GRE Dumps Questions Answers

Recent research has identified_________bats' navigational tool, echolocation: smooth, vertical surfaces

such as the metal or glass plates on buildings can trick a bat into thinking it is flying in open air.

The inventory of confirmed planets outside our solar system is growing rapidly, although it is_________by the fact that it is easier to detect big planets than small ones and planets close to their parent stars than those farther away.

One reason researchers have long believed that Mars never enjoyed an extensive period of warm and wet climate is that much of the surface not covered by wind-borne dust appears to be composed of unweathered material. If water flowed for an extended period, researchers reasoned, it should have altered and weathered the volcanic minerals, creating clays or other oxidized, hydrated phases (minerals that incorporate water molecules in their crystal structure).

It turns out. though, that the scientists were not looking closely enough. New high-resolution mapping data and close-up surface studies have revealed clays and other hydrated minerals in many regions The clay deposits are scattered all over, in ancient volcanic surfaces and heavily cratered highland regions, some of which have apparently been exposed by erosion only recently.

Consider each of the choices separately and select all that apply.

The passage indicates which of the following about the clay deposits an Mars?