Answer:
Explanation:
These proteins, known as growth factors, are signals that stimulate cellular functions such as growth, proliferation, healing and differentiation. In the developing human spinal cord, BMPs are required for the formation of neurons.
The main cause of acid rain is A. Burning of Fossil Fuels
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Answer:
unfortunately, if the snail is deep inside its shell it is most likely ill.
Answer:
Freshwater biomes are large areas consisting of plants and animals grouped around water with "less than 1% salt concentration." This includes lakes, rivers, ponds, streams, and some types of wetlands.