Homeostasis is the maintenance by organisms of a balanced state of internal conditions
Indicate whether the statement is true or false
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Select the most complete explanation of what the pH scale measures.
A. The acidity of a solvent B. The alkalinity of a solvent C. The concentration of buffers in a solution D. The concentration of hydrogen ions in a solution
Dmitri Ivanovski demonstrated that TMV was not spread via bacteria by
A. transmitting sap of infected plants from generation to generation. B. filtering sap from an infected plant through pores smaller than bacteria, and then applying it to a healthy plant. C. spraying sap from an infected plant onto a healthy plant. D. sterilizing sap from an infected plant and then applying it to a healthy plant. E. treating an infected plant with a broad spectrum of antibiotics before extracting sap.
Which ponds did not contain any species of predators?
a. primero, segundo, and tercero b. segundo and quarto c. quarto, quinto, and septimo d. tercero and octavo e. none of the above (all ponds contained predators)
Downy mildews such as Phytophthora infestans belong to this group.
A. plasmodial slime molds B. ciliates C. cellular slime molds D. water molds