Which of the following is most likely to share electrons with other atoms in joint orbitals?
a. chlorine (7 valence electrons)
b. calcium (2 valence electrons)
c. argon (8 valence electrons)
d. carbon (4 valence electrons)
e. potassium (1 valence electron)
D
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A distinctive feature of eukaryotes is the organization of tightly packaged chromosomal DNA with proteins into a membrane-bound structure called a:
A. nucleolus. B. cell. C. nucleus. D. plasma membrane.
Two human activities, burning fossil fuels and ________, are important causes of the increase in atmospheric carbon dioxide
Fill in the blank(s) with correct word
Which one of the following fungal groups has an alternation of multicellular gametophyte and sporophyte generations?
A. Ascomycetes B. Glomeromycetes C. Blastocladiomycota D. Chytridiomycetes E. Zygomycetes
In paracrine communication, paracrine glands secrete their products directly into the bloodstream
Indicate whether the statement is true or false