Mutualism is a long lasting, mutually beneficial interaction among organisms. Which of the following relationships best reflects mutualism? 1) A starfish provides a safe place for sea worms to reside; the starfish receives nothing in return.

2)Reef corals build a hard protective skeleton that algae live in; the algae provide energy to the coral through photosynthesis.

3)Butterflylarvae lay their eggs on jaguars and consume blood and nutrients from the jaguars.
4) Galapagos tortoises eat all the branches of cactus plants; the plant is harmed and sometimes dies.

Sally, age 3 months, has a moist, red, vesicular rash on her cheeks, the backs of her hands, and her arms. her mother said sally was constantly trying to scratch the rash and often has difficulty sleeping. her father has a family history of allergic rhinitis and asthma. discussion questions. 1. review atrophic dermatitis from chapter 3 and discuss the pathophysiology of sally’s symptoms. 2. why is the father’s medical history significant, and what can sally expect as she grows up? 3. discuss the need to limit scratching, and describe practical methods to achieve this.