What is the evolutionary advantage of an exoskeleton? A) It protects the body. B

Question

What is the evolutionary advantage of an exoskeleton? A) It protects the body. B) It waterproofs the body. C) It provides for muscle attachment D) It allows an animal to molt E) A, B, and C only. The monotremes are classified as mammals because they A) Are endoderms B) Are carnlovres C) Are carnlvores D) Have mammary glands E) Give birth to live young rather than lay eggs. What is the primary role of mushroom's underground mycellum? A) protection. B) sexual reproduction C) anchoring. D) absorbing nutrients. E) asexual reproduction. Why is the term cold-blooded not very appropriate for reptiles? A) the keratinized skin of the reptiles serves to insulate and conserve heat. B) the metabolism of the reptiles can generated internal heat by radiation to the environment. E) Reptiles swallow large prey whole to provide enough food to generate boy heat. Chemicals for insect communication are called A) ecdysones B) pheromones C) deutrosones D) protosones E) None of the above Gas exchange in the human lungs occur through structures called A) spiracles B) gas pores C) arteries. D) surfactant E) alveoli The arthropods, especially insects affect human life by which of the following? A) pollination of crops and fruits. B) competition for food of every kind. C) crop damage before and after harvest. D) production and spreading of many plant and human diseases. E) all of the above.

Explanation / Answer

79. The answer is E)A, B and C only.
80. The answer is D)Have mammary glands
81. The answer is D)Absorbing nutrients
82. The answer is C
83. The answer is B)Pheromones
84. The answer is E)Alveoli
85. The answer is E)All of the above

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