Acidic foods generally need a higher canning temperature than do nonacidic foods
Indicate whether the statement is true or false.
Answer: FALSE
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Salt is often used to melt ice on roads during the winter because it lowers the freezing/melting point of water. When salt dissolves in water, individual Na+ and Cl- ions break away from the salt lattice and become surrounded by water molecules. Why would this cause ice to melt?
A. Hydrogen bonds are broken, and the salt ions interfere with interactions between H and O. As a result, it is more difficult for water molecules to bond and form ice. B. Hydrogen bonds are formed, and the salt ions bond with O. As a result, it is more difficulty for water molecules to bond and form ice. C. Hydrogen bonds are broken, and the salt ions bond with O and H respectively. As a result, it is more difficult for water molecules to bond and form ice.
Differentiation is the process by which cells
a. mature into larger cells. b. change from one type of muscle to another. c. allows cells to change to fix injuries. d. turn on all the genomic genes. e. become specialized by turning on some genes and turning off others
If two molecules are mirror images of each other, the two molecules may be
A. cis isomers B. trans isomers C. Enantiomers D. Structural isomers
Which of the following statements about plant reproduction is incorrect?
A. Dioecious plants have male and female flowers on different plants. B. Monoecious plants can have male and female flowers on the same plant. C. Self-pollinated plants must be visited by pollinators for fertilization to occur. D. Outcrossing promotes genetic diversity. E. Self-pollinating angiosperms are usually adapted to stable habitats.