Which statement supports the idea that animal hybridization is unsuccessful? A.
Scientists have studied the adaptation of hybrid species using sunflower
and honeysuckle plants.
B. One example of a hybrid animal is the mule, which is a cross between a
donkey and a horse.
C.
The studies of animal and plant hybrids could lead to discoveries about
how humans have adapted.
OD. Many babies that come from the breeding of different species are unable
to reproduce.

The greatest gift the sumerians gave the world was the invention of writing. the sumerians were wealthy people. they needed some way to keep track of what they owned. they began drawing pictures. they used a reed as a pen. they drew on soft pieces of clay. the soft clay was then dried in the sun. the tablet became a permanent record. later, the sumerian drawings changed into wedge-shaped symbols. this kind of writing is called cuneiform. by putting symbols together, the sumerians could write entire sentences.