The appearance of fossils would the the answer.
Although there has been some scientific debate about what fossil strata should mark the beginning of this period, the "International Geological Congress" determined that the Cambrian period was approximately 543 million years ago of which the first appearance in the fossil record of worms that made horizontal burrows was discovered.
Answer:
I believe they would be h_i_n_g_e.
Explanation:
The Fingers can only move so much unlike the thumb.
Yes when a tadpole "evolves" it will grow into something different
Answer:
In my opinion I think its B. Hypocenter
Sorry if wrong
Answer:
All cells are surrounded by a cell membrane. The cell membrane is semipermeable, allowing some substances to pass into the cell and blocking others.
Explanation:
