Answer:
Cambrian explosion
Explanation:
Cambrian explosion is a geological event that happened during the Cambrian age (541 million years ago). In this period, most of the animal phyla (including marine) appeared and their geological record is preserved in the form of fossils. The period lasted for 13-25 million years. Before this period, the organisms were very simple. They were mostly unicellular in nature and were living in the form of colonies.
The remaining three options are incorrect. They are tectonic events that reflect movement of continents in different geological times. None of them resulted in the diversification of (marine) animal phyla.
Answer:
I hypothesize that the cells are producing many proteins. This is because rough endoplasmic reticulum has ribosomes on the surface and ribsomes function is to make proteins.
Explanation:
No, fish and snakes do not have ears
I think the correct answer from the choices listed above is option A. Skin and nerve cells have different appearances and characteristics from each other, although they contain the same DNA because the genes expressed in inskin cells may not be expressed in nerve cells and vise versa.
Answer:
Joint - a joint is where two bones articulate
In this case, the femur and tibia form a joint.
