Check
match term definition

c
mold fossils a) formed when remains are trapped in tree sap

d
cast fossils b) preserved remains that are transformed into rock

f
trace fossils c) a raised fossil that has filled in the impression from a mold

b
petrified fossils d) impressions from very thin objects that were trapped in mud that was transformed into rock

e
imprint fossils e) preserved records of life, for example, a footprint or a trail

a
amber fossils f) formed when the remains of living things trapped in rock break down and leave a depression

What noticeable trend from this graph might be used to make a conclusion?

In which state was more than 100 billion tons of coal mined in 2005?

Based on the observation that only male crickets produce a song, you hypothesize that a male's song is a form of communication to potential mates. you set up a simple experiment to test this hypothesis. in the laboratory, you place a male snowy tree cricket in enclosure a, which is adjacent to enclosureb. in enclosure b, you place other insects, one at a time, and observe their responses to the male's song. the enclosures are designed so that the two insects being tested cannot see or smell each other, but sound is transmitted from enclosure a to enclosureb.