What is one of the few physiological differences between an XX female and an XY female? Select one:
a. XY females make testosterone, a male hormone.
b. XY females can make both sperm and eggs.
c. XY females usually have no ovaries or uterus.
d. There are no physiological differences; their bodies look and function identically.

Which scientific design has both practical limitations and limitations due to scale? studying the effect of bleach on the growth of mold spores exposing cultures of duckweed to different intensities of light observing the replication of dna molecules with a hand lens using colored marbles to model a cross between two colors of rabbits