Arthropods invaded land about 100 million years before vertebrates did so. This most clearly implies that
A) arthropods evolved before vertebrates did.
B) extant terrestrial arthropods are better adapted to terrestrial life than are extant terrestrial vertebrates.
C) ancestral arthropods must have been poorly adapted to aquatic life, and thus experienced a selective pressure to invade land.
D) vertebrates evolved from arthropods.
E) arthropods have had more time to coevolve with land plants than have vertebrates.
How long does it take for 90% of a sample of strontium-90 (half-life of 28.8 years) to decay?
An overlapping record extends back thousands of years of tree ring width
A man put aside $5710.00 at the end of every 3 months for seven years. How much will he have ...
Population age 65 and over and age 85 and over, selected years 1900-2008 and projected 2010-2050.
Plot of land (Part b)
Offset Method Plot of Land with Measurements