What was the likely reason humans lost their hair (in comparison to our closet ape relatives)?
A. Hair can get matted and dirty which poses increased risk of exposure to disease, and thus that attribute was selected against.
B. Male parental care increases in conjunction with a loss in body hair due to a dip in testosterone. Females thus likely selected for men with less body hair resulting in diminished body hair for humans over thousands of years.
C. As humans became bipedal, they lost their body hair in order to better thermoregulate
Answer: C. As humans became bipedal, they lost their body hair in order to better thermoregulate
You might also like to view...
A virus that kills its host is said to be
A) lytic or virulent. B) temperate. C) lysogenic. D) virulent or lysogenic, but not temperate.
In streams flowing through dense forest, ____; therefore nutrients from organic detritus is particularly important
a. dissolved oxygen levels are high b. dissolved oxygen are low c. the water moves slowly d. dense vegetation blocks light necessary for photosynthesis e. photosynthetic organisms make up most of the life in these streams
What is an important effect of coastal upwelling? a. It creates a stable water column
b. It provides nutrients for photosynthesis. c. It brings zooplankton to the surface. d. It distributes new sediment.
Joint (synovial) cavity
What will be an ideal response?