What type of bond is formed when two atoms share electrons?

A.) electronic bond
B.) covalent
C.) electrostatic
D.) hydrogen
E.) ionic


Answer: B.) covalent

Biology & Microbiology

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Osmotic pressure is a function of the difference in the concentration of ____ on the two sides of the membrane

Fill in the blank with the appropriate word.

Biology & Microbiology

Height (tallness) in humans is a polygenic trait. Assume the following: There are 4 genes that determine height (Aa, Bb, Cc, Dd). Each dominant allele adds 2 inches of height to an individual. The height of the recessive individual (aa, bb, cc, dd) is 5 feet. What is the height of a person with the genotype (AA, Bb, cc, DD)?

A. 5 feet, 4 inches B. 5 feet, 10 inches C. 5 feet, 8 inches D. 6 feet, 6 inches E. 5 feet, 6 inches

Biology & Microbiology

Which of the following best describes the number of distinct evolutionary branches in the domain

Bacteria, as revealed by genome sequencing studies?

a. 3?4 b. 6?7 c. 9?10 d. at least 12 e. at least 20

Biology & Microbiology

Once a pollen tube lands on a compatible stigma

a. chemical cues guide the pollen tube from the stigma to the embryo sac of an ovule. b. that pollen tube continues on to another ovule. c. other pollen tubes are attracted to that ovule. d. other pollen tubes can penetrate that ovule more easily. e. the flower dies to prevent further pollination

Biology & Microbiology