Answer:
D. The scientist uses tennis balls to show the position of the planets and Sun.
Explanation:
In a layman's terms, the solar system is a system consisting of the sun and the planets that orbits around it. These planets are as follows; Mercury, Mars, Earth, Saturn, Venus, Jupiter, Neptune, Uranus etc.
According to this question, using a physical model to represent or describe the solar system means the use of physical objects that can easily be seen or identified. Based on this explanation, the use of tennis balls to show the position of the planets and Sun suits the physical model description of our solar system.
I think the answer will be B
The correct answer is D. It is characterized by coniferous trees. Have in mind that vegetation in alpine biomes is subjected to intense radiation, wind, cold, snow, and ice, it grows close to the ground and consists mainly of perennial grasses, sedges, and forbs<span>. I hope this helps greatly</span>
Answer: The Adenosine triphosphate is the molecule that provides energy to all the living structures like plants, animals and human beings. Energy is required for all the vital processes of the body.
The ATP molecule consists of three components. The sugar lies at the centre (ribose sugar that is found in the RNA).
Both sides of the sugar is attached by two different components. One side of the sugar is attached by the base(adenine) and the other side of the sugar is attached by the phosphate group.
This phosphate molecule is the most important part for the activity of ATP.
Most lipids are <u>nonpolar</u>. This property causes lipids to be <u>water-insoluble</u> in the bloodstream. Lipoproteins form <u>water-soluble </u>complexes for transport through the bloodstream by surrounding <u>nonpolar</u> lipids with <u>polar </u>phospholipids and proteins .
A central hydrophobic core of non-polar lipids, predominantly cholesterol esters and triglycerides, makes up the complex particles known as lipoproteins. Since lipids like cholesterol and triglycerides are not soluble in water, they must be carried in the bloodstream along with proteins called lipoproteins.
These lipoproteins are essential for the small intestine to absorb and transport dietary lipids, for lipids to travel from the liver to peripheral tissues, and for lipids to travel from peripheral tissues to the liver and intestine.
To learn more about lipoproteins click here
brainly.com/question/9041034
#SPJ4
