The correct answer is option (B) lemon juice.
pH refers to the logarithmic scale used to indicate the acidity or basicity of an aqueous solution. It is the negative of the base 10 logarithm of the activity of the hydrogen ion. Solutions with a pH less that 7 are considered acidic and the solutions with a pH greater that 7 are considered to be basic. A pH of 7 is neither an acid nor a base and is considered neutral.
An acid has a high concentration of hydrogen ions (H+) and a base has a low concentration of hydrogen ions. Higher the hydrogen ion concentration, pH is acidic. Among the given substances, lemon juice has a pH of 2, urine has a pH of 6, tomato juice has a pH of 4 and black coffee has a pH of 5. Since lemon juice has a pH of 2, it has the lowest –OH ion concentration.
Answer:
Dominant traits are always expressed when the connected allele is dominant, even if only one copy of the dominant trait exists. Recessive traits are expressed only if both the connected alleles are recessive.
Explanation:
None of the above.
Erosion is more likely to increase when the amount of vegetation decreases. The potential for soil erosion increases if the soil has no or very little vegetative cover of plants.
Plants and their residue form a cover that protects the soil from direct raindrop impact and splash, tending to slow down movement of runoff water and allows excess surface water to infiltrate, preventing erosion by water.
Plants root systems tend also to anchor top soil in place such that it is firm and cannot be easily blown away by wind thus preventing erosion by wind.
The correct answer is C. During the day, the water absorbs the sun's rays, and as a result, the ocean warms up. This process takes longer than land, which is why the beach sand is hotter than the water in the beginning of the day. However, at night, the ocean slowly releases the heat, while the beach sand releases it faster. This means the ocean maintains a more stable temperature than the beach, and also explains why the areas of land near the oceans have a more stable temperature (warmer winters, cooler summers) than inland areas.
