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------------------------------------------------ 13. Which of the following is a benefit of social behavior?
A) Division of labor as workers and soldiers
B) Leads to stable groups
C) Provides protection against attack
D) All of the above

14. Which of the following animals is odd?
A) Porifera
B) Cnidaria
C) Annelida
D) Reptiles

15. A type of frog genus found in the Bale Mountains and Shoa Forest, Ethiopia is:
A) Ptychadena herena
B) Ptychadena goulenger
C) Leptopelis ragazzi
D) A & C
E) B & C

16. _______ is the process of maintaining internal body temperature constant.
A) Thermoregulation
B) Osmoregulation
C) Poikilotherm
D) Homeotherm

17. Which of the following is false?
A) All enzymes are proteins
B) Proteins have different structures
C) Enzymes are markers of various diseases
D) The higher the activation energy, the lower the reaction rate

18. A type of enzyme that is used to unwind DNA is:
A) Lipase
B) Acetylcholinesterase
C) Helicase
D) Trypsin

19. Which one of the following is a physical property of enzymes?
A) Denaturation
B) Solubility
C) Colloidal nature
D) All of the above

20. What is the optimum temperature for enzyme activity in the human body?
A) 37°C
B) 25-30°C
C) 35-75°C
D) 5-30°C

21. Which of the following behavioral patterns of animals responds to periodic changes in the environment?
A) Reproductive behavior
B) Social behavior
C) Behavioral cycles
D) Competition

22. Which of the following is true?
A) Frogs do not produce amniotic eggs
B) Crocodiles deposit their eggs in mound vegetation
C) Birds have camouflaged eggs
D) Rats are representatives of mammalian sexual reproduction
E) All of the above

23. The major parts of a bird's egg are:
A) Yolk
B) Chalaza
C) Albumen
D) All of the above

24. Insects are considered beneficial because:
A) They are effective pollinators
B) They are biological control agents
C) They are sources of useful products and potential protein
D) All of the above

25. The site where an enzyme binds its substrate is the:
A) Active site
B) Substrate
C) Peptide bond
D) Product

26. In Pavlov's classical conditioning experiments on dogs, which of the following is the unconditioned response?
A) The sound of the bell, before presenting food
B) The sight of food from far away
C) The salivation of the dog at the sight of food
D) All of the above

27. Which of the following describes the phenomenon where a female gamete develops into a new organism without fertilization?
A) Monogamous
B) Polygamous
C) Parthenogenesis
D) All of the above

28. A group of animals that possess a well-defined internal skeleton system is:
A) Vertebrates
B) Invertebrates
C) Insects
D) A & B

Answer :

Final answer:

This answer summarizes key concepts in animal behavior, reproduction, and enzyme activity, addressing various aspects from social behavior to thermoregulation. Each question highlights different biological principles, outlining their significance in the understanding of living organisms. Overall, it provides comprehensive knowledge on these biological classifications and processes.


Explanation:

Understanding Animal Behavior and Reproduction

1. Social Behavior: Social behavior in animals is crucial for various benefits, including the formation of stable groups and protection against predators. Among the options provided, the most comprehensive benefit is found in option Dj) All since division of labor, stability, and protection are all significant advantages of social structures.

2. Odd Animal Group: In biological classification, the group that does not fit with the others listed is D) Reptiles as the others (Porifera, Cnidaria, and Annelida) are invertebrates, while reptiles are vertebrates.

3. Frog Genus: The frog genus found in Ethiopia's Bale mountains and Shoa forest includes D) A&C which refers to both Ptychadena herena and Leptopelis ragazzi.

4. Thermoregulation: The process of maintaining a constant internal body temperature is known as A) Thermoregulation, which is essential for homeostasis in endothermic organisms.

5. Enzymes: Among the statements given, C) Enzymes are markers for various diseases is the false statement, as it implies a specific role that enzymes do not fulfill universally.

6. DNA Unwinding: The enzyme that unwinds DNA during replication is C) Helicase, essential for separating the DNA strands.

7. Physical Properties of Enzymes: The physical properties of enzymes, including D) All, encompass denaturation, solubility, and their colloidal nature.

8. Optimum Enzyme Activity: The optimum temperature for enzyme activity in the human body is approximately A) 37°C.

9. Behavioral Patterns: The behavioral patterns in animals that respond to periodic changes in the environment are known as C) Behavioral cycles.

10. True Statements: Among the statements provided, E) all is true as it confirms various reproductive and parental behaviors across species.

11. Birds Egg Composition: The major parts of a bird's egg, which include the D) All components listed (Yolk, Chalaza, Albumen), are vital for the embryo's development.

12. Benefits of Insects: Insects provide numerous benefits; thus, the correct answer is D) All of the mentioned advantages.

13. Enzyme Binding Sites: The site where enzymes bind their substrates is called the A) Active site.

14. Pavlov's Experiment: In Pavlov's classical conditioning trials, an unconditioned response is C) The salivation of the dog at the sight of food.

15. Gamete Development: The phenomenon where the female gamete develops into a new organism without fertilization is known as C) Parthenogenesis.

16. Internal Skeleton: Animals that possess a well-defined internal skeleton are known as A) Vertebrate.


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