Biology 2009

 1. With double fertilization in spermatophytes, there is tissue containing 3n chromosomes, namely... A. egg cell B. zygote C. embryo D. endosperm E. seed coat 

2. In the life cycle of a fern, the fern zygote will develop into... A. fern sporophyte B. fern gametophyte C. sporogonium D. prothallium E. protonema

3. A purple-flowered Latnyrus adoratus flower (CcPp) crossed with a white-flowered ccPp will produce offspring with purple and white flowers in the ratio... A. 1:1 B. 2:6 C. 3:5 D. 5:3 E. 6:4 

4. The table below shows the percentage of water reabsorbed by the excretory system in the kidneys. How many liters of water are in the reservoir if a person drinks 2.5 liters of water? A. 6.6 liters B. 0.5 liters C. 0.4 liters D. 0.3 liters E. 0.025 liters 

5. According to evolutionary evidence, the human hand has the same original shape as... A. horse foreleg B. primitive ape foot C. grasshopper wing D. elephant trunk E. fish dorsal fin 

6. Escherichia coli bacteria cells divide every 15 minutes. The initial population of bacteria in Nutrient Broth medium is 15 cells. What is the population of Escherichia coli bacteria after a 15-hour incubation period? A. 15 × 2 (60) cells B. 16 × 15 × 60 cells C. 15 × 2 × 15 x 60 cells D. 15 × 4 × 15 cells E. 15 × 15 × 15 cells 

7. The following cells are the main sites of photosynthesis in leaves... A. guard cells B. collenchyma cells C. spongy cells D. palisade cells E. epidermal cells 

8. One cause of blood clotting in wounds is a vitamin K deficiency. CAUSE Vitamin K is essential for the process of activating prothrombin into thrombin in the blood clotting process. A. If the STATEMENT is true, the REASON is true, and both show a causal relationship. B. If the STATEMENT is true, the REASON is true, and neither shows a causal relationship. C. If the STATEMENT is true, the REASON is false. D. If the STATEMENT is false, the REASON is true. E. If the STATEMENT and REASON are both false. 

9. Agroecosystems are stable artificial ecosystems. CAUSE Agroecosystems have monoculture communities and low levels of biodiversity. A. If the STATEMENT is true, the REASON is true, and both show a causal relationship. B. If the STATEMENT is true, the REASON is true, and neither shows a causal relationship. C. If the STATEMENT is true, the REASON is false. D. If the STATEMENT is false, the REASON is true. E. If the STATEMENT and REASON are both false.

10. One of the characteristics that distinguishes the species Teania saginata and Teania solium is the presence of a chitinous rostellum. CAUSE Teania saginata has a rostellum, while Teania solium does not. A. If the STATEMENT is true, the REASON is correct, and both show a causal relationship. B. If the STATEMENT is true, the REASON is correct, and both do not show a causal relationship. C. If the STATEMENT is true, the REASON is false. D. If the STATEMENT is false, the REASON is correct. E. If both the STATEMENT and REASON are false. 

11. Rod cells are abundant in the retinas of nocturnal animals. CAUSE Rod cells are necessary for vision in dim light. A. If the STATEMENT is true, the REASON is true, and both show a causal relationship. B. If the STATEMENT is true, the REASON is true, and both do not show a causal relationship. C. If the STATEMENT is true, the REASON is false. D. If the STATEMENT is false, the REASON is true. E. If both the STATEMENT and REASON are false. 

12. Stanley Miller successfully obtained amino acids from abiotic materials CH3, NH4, H2O, and H2, which were heated and subjected to an electric current. CAUSE Amino acids are the basic components of proteins that are essential for building protoplasm. A. If the STATEMENT is true, the REASON is true, and both show a causal relationship. B. If the STATEMENT is true, the REASON is true, and both do not show a causal relationship. C. If the STATEMENT is true, the REASON is false. D. If the STATEMENT is false, the REASON is true. E. If both the STATEMENT and REASON are false. 

13. The carbohydrate formation reaction in the grana of mango leaf chloroplast cells occurs throughout the day. CAUSE The carbohydrate formation reaction is light-independent. A. If the STATEMENT is true, the REASON is true, and both show a causal relationship. B. If the STATEMENT is true, the REASON is true, and both do not show a causal relationship. C. If the STATEMENT is true, the REASON is false. D. If the STATEMENT is false, the REASON is true. E. If both the STATEMENT and REASON are false. 

14. The correct statement about Salamanders is that they... (1) breathe with lungs. (2) are closely related to frogs. (3) live in water. (4) can breathe through their skin. A. 1, 2, 3 B. 1, 3 C. 2, 4 D. 4 E. 1, 2, 3, 4 

15. A large number of algae cells and a number of protozoa culture cells are inoculated together in a vessel containing nutrients for algae growth. If the number of algae is limited by nutrients, the following phenomena can occur: (1) algae and protozoa will continue to increase in number (2) protozoa will increase in number (3) the algae population will suppress the protozoa population (4) protozoa will become a limiting factor in the growth of the algae population A. 1, 2, 3 B. 1, 3 C. 2, 4 D. 4 E. 1, 2, 3, 4