How many neutrons are in a typical oxygen atom?
A. 18
B. 12
C. 8
D. Not enough information given
Answer: C
Biology & Microbiology
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Which of the following structures is common to plant and animal cells?
a. chloroplast b. wall made of cellulose c. tonoplast. d. mitochondrion e. centriole
Biology & Microbiology
Which of the following is the type of bond holding K+ and I- ions together in KI?
A) ionic bond B) covalent bond C) hydrogen bond
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Recessive lethals are often mutations in essential genes
Indicate whether the statement is true or false
Biology & Microbiology
The most widely abused drug in western countries is ___ ___.
Fill in the blank(s) with the appropriate word(s).
Biology & Microbiology