Which statements are true about a grassland ecosystem?
grasslands receive less than ten inches (twenty-five cm) of rain per year.
the soil is rich in nutrients.
many birds of the grasslands build their nests on the ground. a large variety of trees grow here.
much grassland has been converted to grow crops. europe and asia are the only continents with no grasslands.

An atom of nitrogen had seven protons in its nucleus. how many electrons does it have

In what layer of the sun is energy transfers between atoms

You decide that the introduction should also discuss the extremophiles that are referred to as the archaea. these single-cell organisms are considered "extremophiles" due to their ability to survive and reproduce in environmental conditions that would be hostile for most living organisms. archaea species have been isolated from highly acidic sulfur springs, ocean floor thermal vents with temperatures that exceed boiling, and subarctic ice well below freezing. while still considered to be prokaryotic, the archaea have numerous differences that place them apart from the bacteria. choose the characteristics that separate the archaea from other prokaryotic cells. select all that apply. view available hint(s) select all that apply. archaea lack true peptidoglycan in their cell walls. the morphology of the cell is rigid and is geometric in shape, similar to a sphere or cylinder. the cytoplasmic membrane lipids of archaea have branched or ringform hydrocarbon chains. all currently identified and characterized archaea have been linked as the causative agent to an animal or human disease.