Electronegativity is determined by which of the following characteristics of an atom?
a. charge only
b. charge and size
c. size only
d. size and number of vacancies in outermost shell
d
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At the level of the organism, how is osmoregulation achieved?
A. by the movement of solutes across membranes B. by balancing the input and output of water and electrolytes C. by changing the overall permeability of membranes D. by bringing water in through the skin E. None of these choices accurately describe how osmoregulation is achieved at the level of the organism.
A region of plant tissue where sugars are being produced or released from storage is called ____
a. cortex b. plasmodesmata c. stoma d. a source e. a sink
Explain pheromones and theorize why they are not significantly employed by humans? What will be an ideal response?
The respiratory system in a grasshopper is a ________ system.
Fill in the blank(s) with the appropriate word(s).