1. Which feature best distinguishes prokaryotic cells from eukaryotic cells?
A. Presence of ribosomes
B. Presence of a nucleus
C. Presence of DNA
D. Ability to reproduce
2. Which of the following is a defining characteristic of living organisms?
A. Ability to move
B. Ability to photosynthesize
C. Ability to maintain homeostasis
D. Presence of chloroplasts
3. Which structure allows mollusks to scrape or tear food?
A. Mantle
B. Foot
C. Radula
D. Visceral mass
4. Which kingdom contains organisms that are unicellular eukaryotes?
A. Monera
B. Protista
C. Fungi
D. Plantae
5. Which process produces four genetically different cells from one original cell?
A. Mitosis
B. Binary fission
C. Meiosis
D. Cytokinesis
6. Which level of classification is the most specific?
A. Family
B. Genus
C. Species
D. Order
7. Which structure is used by cnidarians to capture prey?
A. Pseudopods
B. Radula
C. Nematocysts
D. Flagella
, 8. Which type of organism plays the role of primary producer in most ecosystems?
A. Herbivores
B. Decomposers
C. Photosynthetic organisms
D. Carnivores
9. Which molecule carries genetic information in all living organisms?
A. Protein
B. ATP
C. DNA
D. Lipid
10. Which type of bacteria can survive with or without oxygen?
A. Obligate aerobes
B. Obligate anaerobes
C. Facultative anaerobes
D. Photosynthetic bacteria
11. Which structure is responsible for gas exchange in most aquatic mollusks?
A. Mantle cavity
B. Nephridia
C. Radula
D. Foot
12. Which process best explains adaptation over generations?
A. Homeostasis
B. Mutation and natural selection
C. Mitosis
D. Artificial selection
13. Which of the following is a density-dependent limiting factor?
A. Drought
B. Flood
C. Predation
D. Temperature
14. Which term describes organisms that obtain energy from dead organic matter?
A. Producers
B. Herbivores
C. Decomposers
D. Parasites
15. Which structure in plants prevents excessive water loss?
A. Phloem
B. Xylem
A. Presence of ribosomes
B. Presence of a nucleus
C. Presence of DNA
D. Ability to reproduce
2. Which of the following is a defining characteristic of living organisms?
A. Ability to move
B. Ability to photosynthesize
C. Ability to maintain homeostasis
D. Presence of chloroplasts
3. Which structure allows mollusks to scrape or tear food?
A. Mantle
B. Foot
C. Radula
D. Visceral mass
4. Which kingdom contains organisms that are unicellular eukaryotes?
A. Monera
B. Protista
C. Fungi
D. Plantae
5. Which process produces four genetically different cells from one original cell?
A. Mitosis
B. Binary fission
C. Meiosis
D. Cytokinesis
6. Which level of classification is the most specific?
A. Family
B. Genus
C. Species
D. Order
7. Which structure is used by cnidarians to capture prey?
A. Pseudopods
B. Radula
C. Nematocysts
D. Flagella
, 8. Which type of organism plays the role of primary producer in most ecosystems?
A. Herbivores
B. Decomposers
C. Photosynthetic organisms
D. Carnivores
9. Which molecule carries genetic information in all living organisms?
A. Protein
B. ATP
C. DNA
D. Lipid
10. Which type of bacteria can survive with or without oxygen?
A. Obligate aerobes
B. Obligate anaerobes
C. Facultative anaerobes
D. Photosynthetic bacteria
11. Which structure is responsible for gas exchange in most aquatic mollusks?
A. Mantle cavity
B. Nephridia
C. Radula
D. Foot
12. Which process best explains adaptation over generations?
A. Homeostasis
B. Mutation and natural selection
C. Mitosis
D. Artificial selection
13. Which of the following is a density-dependent limiting factor?
A. Drought
B. Flood
C. Predation
D. Temperature
14. Which term describes organisms that obtain energy from dead organic matter?
A. Producers
B. Herbivores
C. Decomposers
D. Parasites
15. Which structure in plants prevents excessive water loss?
A. Phloem
B. Xylem
