Looking at the tabe below which two species are the least closely related? Number of Amino Acid Differences between Species
Species 1 Species 2 Species 3 Species 4
74
7
Species 10
65
0
Species 274
29
13
29
0
81
Species 37
13
81
0
Species 4 65
Species 1 & 2
Species 1 & 3
Species 2&3
Species 3 & 4

Each pair of clay balls represents two planetesimals. if each planetesimal is composed of the same material and is separated he the same distance, which pair experiences the frayed gravitational attraction?

Astudent reads the following text in a science book: scientific evidence tells us that the cause of earths four seasons is the tilt of earth as it revolves around the sound the student is instructed to illustrate this information in a science book. how will the student illustrate winter in the northern hemisphere? a. earths northern hemisphere will tilt away from the sun. b. earths northern hemisphere will tilt toward the sun. c. earths orbit will be farther away than from the sun d. earths southern hemisphere will tilt away from the sun.

The earth formed roughly 4.5 billion years ago, yet evidence of life dates back to about 3.5 billion years ago. which one is not a possible hypothesis of how life on earth arose?