Exam 11: Geobiology: Life Interacts With Earth

The boundaries of the Phanerozoic are marked by the __________ of particular groups of organisms followed by ________ of new groups of organisms.

Sedimentary rocks composed of alternating layers of magnetite,hematite,and chert are called

The initial rise of oxygen in the Earth's atmosphere is linked to

Which chemical compound makes up 50 percent to 95 percent of most living organisms?

What is the one finding or assumption that could cast doubt on the role of stromatolites in the early evolution of life on Earth?

Microbes can facilitate mineral growth indirectly by

What significant geobiological event took place 542 Ma ago?

In which geologic environment would you expect to find halophiles?

Microbial pyrite precipitation plays a key role in which cycle?

Halophiles differ from thermophiles in that

A mineral commonly found in black shales because of microbial precipitation is

Modern stromatolites are typically found in what sedimentary environment?

The impact site for the giant Cretaceous-Tertiary asteroid is known as the ______ crater.

Cyanobacteria are _____ who get their energy from the ______ and carbon from ______.

The part of the Earth that contains living organisms is called the

Cynaobacteria are an example of

What type of extremophiles are likely to thrive in oxygen deprived environments?

In order for life to originate,plants need __________ for a long enough period.

The three domains of life are

Organisms that gain energy from feeding directly or indirectly on producers are referred to as