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Norepinephrine is secreted by the

Skulls with an ape-sized brain, sagittal cresting, large mandibles, flaring zygomatics, a face positioned high on the skull and very large molars are associate with [p]

Based on the physical characteristics shown in the images below, which primate taxon does this skull belong to?   

Morphological characteristics that include a broad rib cages, highly flexible shoulder joint, long arms and curved long curved fingers are are associated with [s] locomotion. 

You are researching a new species of primate and notice that males and females differ little in size and have the same sized canines. However, the males are light grey while the females are are dark brown. What is is the probable social system of these primates? 

Identify the appropriate brain size range for each homin species listed below.   Australopithecus afarensis [a] Homo habilis [b] Homo erectus [c] Homo neanderthalensis [d]

true or false Bipedalism evolved before large brains? [l]

Which mystery fossils are Neanderthal?

The images below show the skulls of a male and female primate from the same species. Based on the physical characteristics, determine which skull (A or B) is male or female, and the probable social system these primates (2 points). Describe the testicle to body size ratio for males in this social system and briefly explain why you would expect this ratio (2 points).   

You are in the field in South Africa and discover the remains of a fossil primate. Upon measuring the long bones of this primate, you find the results shown in the chart below. Use the appropriate equation to calculate the intermembral index and determine the pattern of locomotion used by the primate. Provide your numerical answer and the pattern of locomotion in your answer. Show your work! Bone Measurement Humerus 28 cm Radius 29 cm Fibula 23 cm Tibia 23 cm Femur 25 cm   IM Index Value Locomotion Mode 50-80 Vertical clinging and leaping or Bipedal 80-100 Quadrupedal or Semi-Brachiator 100-150 Suspensory