What must be true to consider something to be alive?

Which places the types of clouds in correct order from most thick and puffy, to most thin and wispy? A. cirrus, stratus, cumulus B. stratus, cumulus, cirrus C. stratus, cirrus, cumulus D. cumulus, stratus, cirrus

Which of the following organs is not a part of the immune system? appendix tonsils peyer's patch thymus

Describe the relationship between affluence and ecological footprint

Which neurotransmitter is released by motor neurons at the neuromuscular junction?

Explain how a nutrient can be a limiting factor in an ecosystem

Suppose a bolt of lightning starts a fire in a forest. The fire sweeps through the forest and burns away accumulations of brush and deadwood. What is the most likely effect of the fire on the forest community?

What impact does 2-d diversity have on a company?

How can acid rain affect biodiversity in a pond?

Which of the following would be categorized as a cultural ecosystem service of forests?

Natural selection can lead to formation of a new species which is called?