Answer:
Sonic Hedgehog.
Explanation:
Sonic hedgehog is a secreted protein that in humans is encoded by the SHH gene. It is the best studied ligand of the hedgehog signaling pathway, others being desert hedgehog (DHH) and Indian hedgehog (IHH). It plays a key role in the development of animals, from insects to mammals. In vertebrates, it is involved in organogenesis, including the growth of digits on limbs and the organization of the brain.
Sonic hedgehog has also been shown to act as an axonal guidance cue. It has been demonstrated that SHH attracts commissural axons at the ventral midline of the developing spinal cord. Specifically, SHH attracts retinal ganglion cell (RGC) axons at low concentrations and repels them at higher concentrations
The correct answer to go in the blank would be ''laws''.
Layer c is the oldest and then it’s b and a
Answer:
The importance of Forests
Explanation:
Forests is important because it is the first and foremost means to effective climatic change which w all depend upon. It also provides us with enormous amount of food and oxygen for survival.
This leads to the importance of forest conservation effort towards sustaining the climate again changes that are harmful to human existence. It also explains the need to conserve the forest as source of fuel, food and medicine among others.
Some of the particular threats to forest in my areas include excess deforestation and the governments effort to plant a tree advocacy and other forms of re-orientation programmes to educate people against consistent hunting that reduces forest life.
