Life forms in the Precambrian included
A) trilobites.
B) brachiopods.
C) coelacanths.
D) cyanobacteria.
Answer: D
You might also like to view...
What do we mean when we say the universe becomes transparent at 400,000 years after the Big Bang?
A) the universe ends at that time B) Helium nuclei formed then and since they are transparent it was possible to see to larger distances C) we can only see from one end of the universe to another if we existed before that time D) electromagnetic radiation (light) can travel freely through the universe so we can see to large distances E) protons and neutrons formed then and since they are transparent it was possible to see to larger distances
The speed of light changes when it goes from ethyl alcohol (n = 1.36) to carbon tetrachloride (n = 1.46). The ratio of the speed in carbon tetrachloride to the speed in ethyl alcohol, v2/v1, is
A. 1.99. B. 1.07. C. 0.932. D. 0.511. E. 0.760.
All four jovian planets are oblate, with larger polar than equatorial diameters
Indicate whether the statement is true or false
When you draw the free-body diagram for a single object, you must sketch
1.the forces that act on the single object along with any resulting accelerations that the object experiences. 2.only the forces that act on the object. 3.the forces that act on the object and the forces that the object exerts on other objects. 4.only those forces that the single object exerts on other objects.