10. Many organisms are oogamous and produce:
(A) small, motile sperm cells and large, nonmotile egg cells.
(B) large, motile sperm cells and small, nonmotile egg cells.
(C) sperm and egg cells that are the same size and are both motile.
(D) small, motile sperm cells and large, motile egg cells.
(E) small, nonmotile sperm cells and large, nonmotile egg cells.

6. Mature tracheary elements are unique in a plant because they: (A) have an elongated shape. (B) are alive and transport mainly sugars. (C) are alive and lack a nucleus. (D) have a primary wall only and are dead. (E) are dead and transport mainly water and minerals.

7. In a foliage leaf, the majority of photosynthesis occurs in the: (A) upper epidermis. (B) palisade parenchyma. (C) bundle sheath parenchyma. (D) spongy mesophyll. (E) lower epidermis.

8. If a water molecule entered a mature root at the root surface, it would cross what tissues, in their correct order, on its way to the center? (A) Epidermis, endodermis, cortex, phloem, xylem (B) Epidermis, cortex, pericycle, endodermis, phloem, xylem (C) Cortex, endodermis, phloem, pericycle, xylem (D) Epidermis, cortex, endodermis, pericycle, phloem, xylem (E) Endodermis, epidermis, cortex, pericycle, phloem, xylem

9. It is likely that asexual reproduction would be more advantageous to a species than sexual reproduction under what conditions? (A) A rare late spring frost (B) An unusually severe summer drought (C) A stable climate (D) Global warming (E) Introduction of a fungal disease

11. To promote plant growth, lights called grow lights should produce light enriched in what wavelengths? (A) Red and green (B) Red and blue (C) Yellow and blue (D) Blue and violet (E) Orange and violet

12. Which of the following is NOT a difference between aerobic respiration and photosynthesis? (A) Function of the electron transport chain (B) Site of the process (C) Energy source for phosphorylation (D) General type of redox process (E) Role of O2

13. Water moves from the soil into the xylem of a root via: (A) diffusion. (B) diffusion and osmosis. (C) active transport. (D) membrane vesicles. (E) translocation.

14. The conversion of N2 into ammonia is called: (A) nitrogen reduction. (B) nitrate reduction. (C) nitrogen assimilation. (D) denitrification. (E) nitrogen fixation.

15. Which of the following about chloroplasts and mitochondria is incorrect? (A) They are of the appropriate size to be the descendants of bacteria. (B) They contain circular DNA not associated with histones. (C) They contain their own genome and produce all proteins they need. (D) Their ribosomes are more similar to those of bacteria than to those of eukaryotes. (E) Their membranes have enzymes and transport systems that resemble those in the plasma membrane of prokaryotes.

16. What is the appropriate order for oxidation of glucose to CO2, H2O and ATP? 1. convert pyruvate to acetyl CoA 2. electron-transport chain 3. citric acid cycle 4. oxidative-phosphorylation 5. glycolysis (A) 51324 (B) 35142 (C) 14523 (D) 31425 (E) 41352