Answer:
false, thats igneous rocks
Answer:
External factors include physical and chemical signals. Growth factors are proteins that stimulate cell division. – Most mammal cells form a single layer in a culture dish and stop dividing once they touch other cells. Two of the most important internal factors are kinases and cyclins.
Answer:
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D. oxidation-reduction reaction
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Explanation:
1. Oxidation-reduction reaction: An oxidation-reduction reaction (also known simply as redox reaction) is one of the type of chemical reaction, it involves a transfer of electrons between two species.
2. In plants light is absorbed by chlorophyll which causes transfer of electron from water, and the final acceptor of electron is oxygen.
3.Plants takes carbohydrates from environment and water from earth, and with the help of sun-light they make carbohydrates and oxygen, so they are called autotrophs.
Answer: skeletal muscles cells
Explanation: Skeletal muscle cells are elongated or tubular. The cells are striated and multinucleated they appear as long, unbranched cylinders. They have multiple nuclei which are located on the periphery of the cell.
Skeletal muscle is basically voluntary and it responds to conscious stimuli.
Answer:
The correct answer is D) requires phosphorylase activity.
Explanation:
Signals transmitted with the use of phosphorylation requires the presence and activity of an enzyme phosphorylase (also called Kinase) that can add phosphorus groups to proteins or other molecules in order for them to become messengers in the signaling pathway.