Cyanobacteria which first appeared on earth over 3 billion years ago are

In which vertebrate lineage has the studied gene evolved most rapidly?

Describe why the inner and outer planets have different characteristics. 15 pts - Response is descriptive and clearly states why the inner planets are rocky and why the outer planets are made of gas.

What percentage of the ocean is made up of sea salts? Select one: a. 5.5% b. about 10% c. 3.5%

What are some advantages and disadvantages of allopolploidy compared to autopolyploidy?

2. Species that evolve in different locations but similar environments can appear similar. This is known as A) convergent evolution B) geographic isolation C) divergent evolution D) continental drift

Which statement describes a situation that would reduce the stability of a forest ecosystem? (1) A fierce predator is removed from the ecosystem. (2) The number of producers remains constant in the ecosystem.

A scientist is studying a region of an ocean floor she discovers a long deep canyon that runs parallel to the coastline of a nearby continent what can she inferred from her discovery

Anson is 75 years old and has recently been experiencing a change in his personality. He is acting more impulsively and does not seem to care about his loved ones, to whom he has always been very devoted.

What is the best explanation if the gel of your PCR product shows smeared bands of multiple sizes? Select one: a. Non-specific gene amplification b. Primers hybridizing with one another c. Your isolate was not from a single bacterial colony d.

Explain how the circulatory system of cephalopods is different from that of other mollusks