If cyanobacteria had failed to appear on Earth, how would the evolution of Earth's atmosphere most likely be different

Which of the following are also major levels of classification? A. Genus B. Species C. Group.

What is tan (27°) ? A. 0.89 B. 0.51 C. 0.45 D. 0.27

What is the atmosphere made up of?

A 5.83 kg object is released from rest while fully submerged in a liquid. The liquid displaced by the submerged object has a mass of 2.72 kg. Take the upward direction to be positive. What is the displacement of the object in 0.

a force 10N drags a mass 10 kg on a horizontal table with acceleration 0.2m/s. If the acceleration due to gravity is 10m/s2, a coefficient of friction between the moving mass and a table is?

The metric system and metric conversions are?

Ron bicycles forward with an acceleration of 2.1 m/s2. If he is applying a forward force of 195 N, what is his mass?

Diane swim 5 kilometers against the current in the same amout of time it took her to swim 15 kilometers with the current. The rate of the current was 2 kilometers per hour. How fast would diane swim if there were no current?

A man paddles a canoe in a long, straight section of a river. The canoe moves downstream with constant speed 5 m/s relative to the water. The river has a steady current of 1 m/s relative to the bank. The man's hat falls into the river.

In an atom, almost all of the mass is concentrated in a tiny nucleus because