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An 8-year-old afebrile male patient is referred to the Orthopedic clinic because he has significant right hip and knee pain. The patient is noted to walk with a limp as he enters the office, and the patient’s mother denies any history of trauma. On physical examination, you note atrophy of the right quadriceps muscles and decreased range of motion (ROM) of the right hip, particularly with internal rotation and abduction. Leg length inequality is also observed on the right compared with the left. Frog-leg radiographs of the right hip reveal cessation of growth at the capital femoral epiphysis and a smaller femoral head epiphysis with widening of the articular space on the right side. White blood cell counts, C-reactive protein, and erythrocyte sedimentation rates are all normal. Which of the following conditions is the most likely diagnosis?

Which of the following best describes the symbiotic relationship between the protozoan causing malaria and humans?  

The earliest terrestrial plants were………. Mark all that apply for full credit

chemotrophs are 

Which one is mismatched  

A group of organisms that can  interbreed to produce a viable offspring is called a  

This biome is characterized by little precipitation, water storing plants, low species diversity

Malaria is spread by 

 All of the following animal groups are ectothermic except for one. Which one is NOT ectothermic?

Lions often hide in the tall grass while stalking their prey.  This is an example of how __________ helps them to survive.