Oparin proposed a primordial soup hypothesis for the formation of life on early Earth. He outlined conditions that were on Earth that would give rise to primitive life. Upon a simulated laboratory experiment, he observed evidence that supported his theory, Which
pieces of evidence would support the primordial soup hypothesis outlined by Oparin? Select ALL that apply.
)
A)
The presence of amino acids and precursors to proteins,
B)
The production of oxygen gas from the decomposition of water.
The formation of carbon monoxide from the breakdown of carbon dioxide.
D)
The formation of long hydrocarbon chains from water and carbon dioxide.
E)
The formation of coacervates and primitive cells were observed in
simulated lab conditions,

Despite the differences in mature plant cells, all of them are derived from meristem cells. the three major types of tissue systems develop from the meristem. meristems develop cells in all but which tissue?

Why are fossils not found in igneous rocks? igneous rocks are made from cooling of lava or magma. igneous rocks are found too deep underground. igneous rocks are too dark in color to contain fossils. igneous rocks are too dense to contain fossils.

Our planet has experienced five major extinctions in the four billion year history of life. the first, 450 million years ago, occurred shortly after the evolution of the first land-based plants and 100 million years after the cambrian explosion. the second extinction occurred 350 million years ago, causing the formation of coal forests. next earth experienced two mass extinctions during the triassic period, between 250 and 200 million years ago. the fifth mass extinction occurred 65 million years ago, ending the reptilian dominance of the earth. according to richard leakey, the sixth mass extinction is happening right now. leakey suggests that we, the human race, are the cause. each year, at our hand, approximately 50,000 species vanish from earth. he believes that man is destroying earth at a rate comparable with the impact of a giant asteroid. leakey's statistics indicate that 50% of earth's species will become extinct within the next 100 years assuming leakey's hypothesis of a sixth mass extinction to be true, how will we expect the model to change? a) a sharp spike in the graph approximately 100 million years from now b) a dip in the graph, followed by a sharp spike about 100 million years from now c) a sharp spike in the graph immediately following the "0" location of the x axis d) a plateau following the "0" mark on the x axis, followed by a gradual rise to a new peak