The distinction between protostomes and deuterostomes is based on differences in their embryological development. Protostomes develop their oral end from their first developmental opening, while deuterostomes have their oral end develop from the second opening on the dorsal surface.
Answer:
Hair cells are present inside the inner ear that acts as a receptor of sound. Researchers affirmed that once there is a damage to the hair cell, it can regenerate in birds.
Damage hair cell can lead to loud noise which in turn affect the ear. The supporting cells are present along with the hair cells. When the hair cells get damaged, the supporting hair cell gets the signal to start the process of regeneration.
Answer:
C. top soil has more organic matter.
Explanation:
It's more fertile than subsoil, due to having more organic matter and because fertilizers are usually added to the topsoil only.
1. 25% which is bb
2. All living things are made of cells
3. Grams, mass
Hope that helps.
