Daily Practice Questions

Explanation: The total time spent watering is the sum of the time per tree multiplied by the number of trees ($5T$) and the time per shrub multiplied by the number of shrubs ($2S$). Since Jane can spend *no more than* 30 minutes, this constraint requires an inequality using "less than or equal to" ($\leq$), resulting in $5T + 2S \leq 30$. Choices (A) uses $\geq$, which implies a minimum time requirement rather than a maximum limit, while (C) and (D) incorrectly use multiplication instead of addition to combine the distinct tasks.

Explanation: The sentence requires a grammatically correct and stylistically appropriate infinitive construction. 'To understand the great forces of nature' is the proper infinitive form that logically completes the sentence. The phrase 'to understand' is needed to maintain parallelism and grammatical correctness with the verb 'regard'.

Explanation: The number of rows in mat is given by mat.length . The indexes of the rows range from 0 to mat.length - 1 . The number of columns in mat is given by mat[0].length . You can think of this as the length of the array represented by mat[0] , the first row. (Note that all the rows have the same length, but it is wise to use mat[0] , since you know that the matrix has at least one row. For example, mat[1] may be out of bounds.) The indexes of the columns range from 0 to mat[0].length - 1 . The last element to be accessed in a row-by-row (or column-by-column) traversal is in the bottom right corner—namely, mat[mat.length - 1][mat[0].length - 1] .

Explanation: C —If the solute is an electrolyte, the solution will conduct electricity. Nonelectrolytes do not conduct electricity. Strong electrolytes conduct electricity extremely well. Weak electrolytes also conduct electricity, but not as well as a strong electrolyte.

Explanation: This scenario illustrates **reduced hybrid viability**, a form of postzygotic reproductive isolation where the zygote forms and begins dividing but fails to develop into a viable, living offspring. This occurs because genetic incompatibilities between the two distinct species prevent proper embryonic development or survival after birth. In contrast, reduced hybrid fertility would involve a viable organism that cannot reproduce, while gametic isolation prevents fertilization from occurring in the first place.

Explanation: Since the sentence used Stop punctuation, write 'Yes' next to the answers that also use Stop punctuation, (A) and (B). Before you worry about (D), which changes the wording, focus on the remaining choice with the exact same wording as the original sentence. Remember that a comma alone can never be Stop Punctuation, so (C) is grammatically wrong. Write a 'No' next to that one. That will be the odd one out, so it is the correct answer.