Summarize and discuss the fossil evidence indicating that eukaryotic cells appeared as much as 1.2 billion years ago
Give examples of some of these early eukaryotic organisms. What will be an ideal response?
The Mesoproterozoic rocks 1.2 billion years old in Canada contain fossils of the oldest
known eukaryotes. Other Proterozoic rocks have older fossils, but the affinities are unknown.
The oldest megafossil was found in 2.1 billion year old rock in Michigan. In addition,
acritarchs, which are probably cysts of floating algae, are found in the rocks. Vase-shaped
skeletons have been found, and have tentatively been identified as cysts of algae.
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How can you heat air without decreasing its relative humidity?
What will be an ideal response?
Which of the following is the main type of fog that forms off the coast of Newfoundland?
A. steam fog B. radiation fog C. advection fog D. frontal fog
A Smaller Intrusive lens shaped igneous rock body is called a ________.
a) Stock b) Batholith c) Laccolith d) Dike e) Sill
P-waves and S-waves ____
A)are two types of surface waves B)are also called Rayleigh waves C)are also called Love waves D)cause the individual particles of the material to move back and forth in a horizontal plane perpendicular to the direction of wave travel E)are the slowest type of seismic waves