Which example involves a cell membrane receiving and sending messages

Where would you expect to see seedless plants, such as ferns and mosses? a. in a botanical museum, because they are all extinct b. low and close to the ground in a moist environment c. climbing high while circling the branches of another plant d. deeply rooted in a forest with a trunk that reaches 20 meters or more

What was the land like over 500 million years ago? what was under the sea?

Explain the source of radioactivity in uranium in earth’s crust by which it produces nuclear radiation