Answer the following statements true (T) or false (F)
1. The presence of salt helps prevent oceans from freezing.
2. A dehydration reaction that builds larger molecules from smaller units requires the addition of a water molecule.
3. The hydroxyl (OH-) concentration of a solution with a pH of 8 would be 10-6 molar.
4. Most enzymes or bioactive molecules work effectively within a broad range of pH.
5. Buffers minimize fluctuations in the pH of a solution.
1. TRUE
2. FALSE
3. TRUE
4. FALSE
5. TRUE
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Which fuel contains more potential energy per unit weight than gasoline?
A. Hydrogen B. Ethanol derived from corn C. Ethanol derived from algae D. None of these contain more energy per weight unit than gasoline.
According to cladistics, a derived character state is called a(n) ____
a. apomorphy b. exaptation c. polymorphy d. homology e. homoplasy
Which area, A, B, C, or D, is an area of self-perpetuating embryonic tissue that often continuously grows and produces new tissue during the life of a plant?
1.A
2.B
3.C
4.D
Most conifers have only tracheids. Which structural feature allows water and minerals to pass from one tracheid to the next?
A) Stomata B) Pits C) Secondary cell walls D) Plasmodesmata E) Sieve plates