Bill and bi-cameral
7. A
8. B
The correct answer is A.) electric sewing machine
Electric sewing machines replaced hand sewing and made it so that cloth could be produced at a faster rate than ever before.
Answer:
The most common directly preserved fossils are unaltered hard parts of a living organism, like shells, teeth, and bones. ... After the remains of an organism have been buried and cemented within sediment, water percolating through the sediment leaches out the fossil. This leaves a cavity in the rock, called a mold.
Explanation:
