Answer:
1. Answer: Light can travel in a vacuum, and its speed is constant if the source is moving or stationary.
Light travels at constant speed in vacuum even if the source is moving or stationary. If the source is moving, the apparent frequency/ wavelength changes.
Answer:
Phosphates are critical part of life because of the diverse roles they perform in the lives of living organisms, especially in DNA and RNA molecules.
Phosphates are formed from two elements, phosphorus and oxygen. Phosphorus is a very important element that play a crucial roles in the formation of bones and teeth. It is also plays vital roles in carbohydrate metabolism, fat metabolism, protein synthesis and repair of worn out tissues. Oxygen on the other hand is required for oxidation of biological fuel and for breathing.
Phosphates are usually formed from one atom of phosphorus and four atoms of oxygen, it has the chemical formula PO4. Phosphate is an important component of DNA and RNA molecules, phosphates hold these molecules together. Phosphate molecule is also found in ATP, which is the energy currency of living cells.
C.
The skeletal system provides structure to the human body.
Full Question found elsewhere
The human body processes and eliminates food waste using the organs of the excretory system. Which organelle performs a similar function in humans at the cellular level?
Answer:
Lysosome
Explanation:
The lysosome is a part of the endomembrane system. It is a series of sacs containing digestive enzymes that are surrounded by membranes. Lysosomes are produced by the Golgi apparatus. They break down waste products so some components can be released outside the cell and others can be recycled.
