79. What is the evolutionary advantage of an exoskeleton? A) it protects the bod
ID: 272792 • Letter: 7
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79. What is the evolutionary advantage of an exoskeleton? A) it protects the body. B) it waterproofs the body. It provides for muscle attachment D) It allows an animal to molt 80. in lactating mothers, the two hormones that promote milk synthesis and milk release. respectively are and A)prolactin and calcitonin. B) prolactin and oxytocin C) follicle stimulating hormone and luteinizing hormone. D) luteinizing hormone and oxytocin. E) estrogen and progesterone. 81. What is the primary role of mushroom's underground mycelium? D) absorbing nutrients. E) asexual reproduction A) protection B) sexual reproduction C) anchoring. 82. Which gland is both endocrine and exocrine? A). thyroid gland. B. pineal gland C). pancreatic gland. D). adrenal gland. E). parathyroid gland. 83. Chemicals for insect communication are called D) protosones E) None of the above A) ecdysones B) pheromones C) deutrosones 84. Gas exchange in the human lungs occur through structures called D) surfactant E) alveoli A) spiracles 8) gas pores C) arteries 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 85) E) all of the above.Explanation / Answer
79) The correct option is E. AB and C only.
The exoskeleton protects the body, acts as waterproofs the body. It also provides for muscle attachment.
80) The correct option is B. Prolactin and Oxytocin.
Prolactin and Oxytocin hormones promote milk synthesis and milk release. The key hormone involved in lactation is prolactin. Oxytocin is essential for the milk ejection reflex in response to suckling.
81) The correct option is D. absorbing nutrients.
Fungus such as mushroom absorbs nutrients from its surroundings through the mycelium.
82) The correct option is C. Pancreatic gland.
The pancreas gland or Pancreatic gland acts both as endocrine and exocrine gland. The pancreas contains islets of Langerhans which consists alpha and beta cells. Beta cells secrete insulin and alpha cells secrete glucagon. Insulin and glucagon are hormones, which maintain a healthy blood glucose concentration.
It is an exocrine gland because hormonal stimulation causes pancreatic secretions to be released into the duodenum through a duct.
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