What is the most abundant gas in the atmosphere

A:ozone

B:water vapor

C:oxygen

D:nitrogen

Which type of respiration takes place when there is no oxygen present

What characteristics are shared by all living things?

What 3 carbon molecule exits glycolysis and enters the krebs cycle? Question options: Pyruvic Acid Glucose Acetyle CoA Lactate

soil erosion can increase when humans remove trees and other vegetation from an area. what is this process called?

Witch of these biotechnolgies has the potential repair tissues inside the body

What are at least three possible challenges Darwin might have faced

Which two spheres contain most of earths water?

What is the name of a complex group of organisms that are connected and interact with one another?

Oceanic crust is composed mainly of basalt. continental crust is composed mainly of granite. why does oceanic crust generally tend to subduct under continental crust when plates collide

What is placebo and why is it used in some experiments