Within a stream or river, where does the water move the fastest? Where does it move slowest?
Ans: Fastest: riffle & run // Slowest: glide & pool
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Describe two ways in which the unique membrane lipids of archaea protect them from environmental stress: one for pH and one for temperature.
What will be an ideal response?
Today's atmosphere on Earth is made up of nitrogen, oxygen, carbon dioxide, and water. According to all models, which of these was largely absent 3.8 billion years ago?
A) oxygen B) nitrogen C) carbon dioxide D) water
Stimuli are received by receptors in the _______ ______ system.
Fill in the blank(s) with the appropriate word(s).
Dmitri Ivanovski demonstrated that TMV was not spread via bacteria by
A. transmitting sap of infected plants from generation to generation. B. treating an infected plant with a broad spectrum of antibiotics before extracting sap. C. filtering sap from an infected plant through pores smaller than bacteria, and then applying it to a healthy plant. D. sterilizing sap from an infected plant and then applying it to a healthy plant. E. spraying sap from an infected plant onto a healthy plant.