Carbon and hydrogen have similar electronegativities and combine together to form hydrocarbon molecules. What type of bonds form between these atoms?

A. hydrogen
B. ionic
C. polar covalent
D. nonpolar covalent
E. electrostatic


D. nonpolar covalent

Biology & Microbiology

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How do water moulds differ from true fungi?

a. Water moulds are haploid, while fungi are diploid. b. Water moulds form hyphae, while fungi form mycelia. c. Water moulds have a different genetic composition than fungi do.

Biology & Microbiology

Which of the following is both a codon for an amino acid and a start signal?

A. AAA B. AUG C. UAG D. GAU E. UGA

Biology & Microbiology

Substances that release ions when dissolved in water and conduct electricity are ________.

A. electrons B. solvents C. nonpolar D. electrolytes E. covalent

Biology & Microbiology

The rate of transpiration, the flow of water through the stem, and leaf water potential are measured in a tree during a 24-hour period under normal environmental conditions. The results from these measurements are shown in the graphs below. (There is an image in your packet #97-100) 2002 test In this experiment, water flow up the stem could be measured in which of the following structures?

(A) Phloem (B) Xylem (C) Lenticels (D) Stomata (E) Casparian strip

Biology & Microbiology