Sulfur is an essential element in the human body, and studying its characteristics is important in understanding human physiology. Sulfur atoms have six electrons in their outer shell. Based on this information, which of the following is TRUE?
A) Sulfur is inert.
B) Sulfur has eight electrons in its outer shell.
C) Sulfur can form important molecules using covalent bonds.
D) Sulfur is an important isotope of hydrogen.
C
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Why is it hard to classify protists?
A. Because they differ in their complexity, some being unicellular, some being multicellular B. Because they come from such in such a wide variety of size and shape C. Because they differ in their nutrition and energy use D. All of the above are reasons why protists remain hard to classify
Compare and contrast the processes of photosynthesis and aerobic respiration. How are they similar
and how do they differ? What will be an ideal response?
Hybrid zones are typically ____, presumably because the hybrid organisms are not well adapted for either parental
environment. a. rare b. narrow
c. expansive d. experimental e. restricted to few biomes
Arthropods were able to move onto land because their ________ prevented dehydration and provided support
Fill in the blank(s) with correct word