5 points A group of researchers discovered the fossilized remains of a flying
mammal that appears to have lived 130 million to 165 million years ago.
Since the earliest flying birds are believed to have appeared about 150
million years ago, researchers concluded that birds and mammals began
to fly at about the same time. This conclusion would be most weakened by
evidence of which of the following? *
A 100-million-year-old fossil of a flying bird
A 120-million-year-old fossil of a flying bird
A 160-million-year-old fossil of a flying mammal
o
A 200-million-year-old fossil of a flying
Yes

i believe it would be c: tons.

a researcher conducts an experiment on the secretion of a particular hormone in mice. scientists inject mice with a substance that stimulates the production of the hormone. the scientists then test the levels of hormones produced by the mice. the tool used to measure the hormones consistently detects the levels at 10 points lower than the actual hormone levels in the mice. this tool makes measurements, but the measurements aren't .

explanation:

no u

the rocks are classified by the geological process they are formed by. the three main groups of rocks are igneous, metamorphic, and sedimentary. minerals are not they are classified under the chemical classes they are in. these groups include silicates, sulfates and carbonates.