Triploids are usually autopolyploids. They arise spontaneously in nature, but they can be constructed by geneticists from the cross of a 4n (tetraploid) and a 2n (diploid). Triploids are characteristically sterile due to

TLS Online TPP Program

#Question id: 4958

#Unit 11. Evolution and Behavior

What is true of the fossil record of mammalian origins?

TLS Online TPP Program

#Question id: 4961

#Unit 11. Evolution and Behavior

An early consequence of the release of oxygen gas by plant and bacterial photosynthesis was to

TLS Online TPP Program

#Question id: 4963

#Unit 11. Evolution and Behavior

Which free-living cells were the earliest contributors to the formation of Earthʹs oxidizing atmosphere?

TLS Online TPP Program

#Question id: 4964

#Unit 11. Evolution and Behavior

Which of the following statements provides the strongest evidence that prokaryotes evolved before eukaryotes?

TLS Online TPP Program

#Question id: 4965

#Unit 11. Evolution and Behavior

What is thought to be the correct sequence of these events, from earliest to most recent, in the evolution of life on Earth?

1.  origin of mitochondria

2.  origin of multicellular eukaryotes

3.  origin of chloroplasts

4.  origin of cyanobacteria

5.  origin of fungal-plant symbioses

TLS Online TPP Program

#Question id: 4967

#Unit 11. Evolution and Behavior

Recent evidence indicates that the first major diversification of multicellular eukaryotes may have coincided in time with the