Using Tim and Moby's exploration of the desert as your model, break down the main characteristics of other major ecosystems.
Tropical rainforest
Arctic tundra
Sunlight temperature
Community
Esample of a population
Its habitat

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what do the different brain waves do?

explanation:

brainwaves are produced by synchronised electrical pulses from masses of neurons communicating with each other. brainwaves are detected using sensors placed on the scalp. brainwave speed is measured in hertz (cycles per second) and they are divided into bands delineating slow, moderate, and fast waves.

b tumor cells have a cell wall instead of a membrane

explanation:

tumor cells different from normal cells because tumor cells have a cell wall instead of a membrane.

instead of copying and pasting things off of tests or work done on computer which im sure you did, try and read over the question carefully