Chapter 25 Flashcards


Set Details Share
created 8 years ago by berrdavon
971 views
show moreless
Page to share:
Embed this setcancel
COPY
code changes based on your size selection
Size:
X
Show:
1

Evolution works by

tinkering with existing structures

2

Hox genes are thought to play an important role in the development of different morphologies because they

provide positional information in the embryo.

3

The atmosphere of early Earth probably contained no O2 until the emergence of organisms that used

water as an electron source for photosynthesis

4

Radiometric dating allows us to

indirectly date fossils up to billions of years old based or minerals in surrounding volcanic strata.

5

The oldest fossils usually are found in

the deepest strata

6

Earth probably formed __________ and the first life evolved as early as _________

4.5 billion, 3.9 billion

7

RNA is believed to be the genetic material because RNA has both

informational storage and catalytic properties

8

Miller and Ureys experiments that attempted to recreate conditions on early Earth were significant because they showed that

Organic molecules such as amino acids could be produced from inorganic molecules