Answer:
new moon phase
Explanation:
Contact forces only work by pushing.
Contact forces only work by pulling.
Contact forces require the physical contact between objects.
Contact forces work between two objects that do not touch.
In physics, a contact force is a force that acts at the point of contact between two objects, in contrast to body forces. Contact forces are described by Newton's laws of motion, as with all other forces in dynamics. Contact force is the force in which an object comes in contact with another object.
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b)growth factors
c)the mitotic spindle
d)cancer cells
Answer:
a) Cyclins
Explanation:
The internal regulators of the cell cycle are cyclins and CDK (cyclin-dependent kinase). These are proteins that regulate the cell cycle in different checkpoints.
The cyclin proteins stimulate another kind of protein i.e. CDK, which helps in the entry and exit of cells in different checkpoints. The checkpoints are G1, S, and G2 phases. Without this protein regulation the cell cycle can't run properly, nondisjunction of chromosomes, and cancer may result.
The growth factors help in the migration of cells in different parts of the body. This causes cellular growth. These include hormones and enzymes.
Mitotic spindle/spindle fibers separate the double number of chromosomes and put them equally in 2 daughter cells. During the cell cycle, the spindle fibers are not active. It is active in cell division.
Cancer cells are uncontrolled growth of cells. This results due to the failure of cell cycle regulators. Thus cells divide rapidly.
2. What are the elevations of lines A and B?
3. Provide an approximate elevation for points W (point is inside the circle), X, and Y (point is on the line).
1. The contour interval is 20.
Explanation:
On the map we can see a relief that is depicted with contour lines. The contour lines tend to be very close to each other in general so we can safely make the assumption that the relief is relatively steep, though in accordance to the elevations it is not a high one, but instead the highest points are actually hills.
From the numeric markings on the contour lines we can see the numbers 100, 200, 300, and in between them there are four contour lines. Since the difference in elevation in between every fifth contour line is 100, if we divide that number by the number of contour lines from one thicker contour line to another, which is five, than we get a value of 20, meaning that that is the contour interval.
2. and 3. A has an elevation of 80, B of 60, W between 301 and 319, X between 21 and 39, and Y of 400.
Explanation:
The contour interval is 20 on this map, so with the values we already have as marked on every fifth contour line, as well as the additional contour elements on the map or better reading of it, we can relatively easily establish the value of any point. We have five points in question, some being on the contour lines themselves, while some inside of them, meaning that for the ones on the contour lines we can give an exact value, while for the one inside we can give approximate value.
The points A, B, and Y are all marked on contour lines. A is on the contour line just below the one marked with 100, so minus 20 means that it has a value of 80. The point B is on the second contour line below the one marked 100, so minus 40 means it has a value of 60. Point Y is marked on a main contour line which is not marked, but it is the first thick one after the one marked with 300, so 100 plus means it has an elevation of 400.
Points W and X are marked inside the contour lines, so we can just give a range of value for them. Point W is marked above the contour line marked with 300 and there is no next contour line. Since the contour interval is 20, it means that this point can have value ranging from 301 to 319. Point X is marked below the contour line with a value of 40 and there is no other contour line below, meaning that the value can be in the range of 21 to 39.
These are the organic molecules:
1) Organic molecules can be found in living organisms, but they can also be found in non-living things, such as petroleum and coal.
2) The four major groups of biomolecules are carbohydrates, lipids, proteins, and nucleic acids.
3) Carbohydrates are molecules that contain carbon, hydrogen, and oxygen. They are the most abundant biomolecules in living organisms. Carbohydrates can be simple sugars, such as glucose, or complex carbohydrates, such as starch and cellulose.
4) Lipids are a diverse group of molecules that are also made of carbon, hydrogen, and oxygen. Lipids are not soluble in water, but they are soluble in organic solvents, such as alcohol and ether. Lipids can be used for energy storage, insulation, and protection.
5) Proteins are molecules that contain carbon, hydrogen, oxygen, and nitrogen. They are essential for life and are involved in a wide variety of functions, such as structure, metabolism, and cell signaling.
6) Proteins are composed of amino acids. Amino acids are molecules that contain an amino group (-NH2), a carboxyl group (-COOH), and a side chain (R). The side chain varies from amino acid to amino acid and gives each amino acid its unique properties.
7) Linked amino acids form polypeptides. Polypeptides are chains of amino acids that are linked together by peptide bonds.
8) The two forms of nucleic acids are deoxyribonucleic acid (DNA) and ribonucleic acid (RNA).
9) Nucleic acids are composed of nucleotides. Nucleotides are molecules that contain a sugar, a phosphate group, and a nitrogenous base. The sugar in DNA is deoxyribose, while the sugar in RNA is ribose. The nitrogenous bases in DNA are adenine (A), guanine (G), cytosine (C), and thymine (T). The nitrogenous bases in RNA are adenine (A), guanine (G), cytosine (C), and uracil (U).
10) Nucleotides link together to make a nucleic acid through phosphodiester bonds. Phosphodiester bonds are formed between the phosphate group of one nucleotide and the sugar of the next nucleotide.
11) DNA and RNA are structurally different in several ways. DNA is a double-stranded molecule, while RNA is a single-stranded molecule. DNA contains the sugar deoxyribose, while RNA contains the sugar ribose. DNA contains the nitrogenous bases adenine (A), guanine (G), cytosine (C), and thymine (T), while RNA contains the nitrogenous bases adenine (A), guanine (G), cytosine (C), and uracil (U).
Find out more on organic molecules here: brainly.com/question/26556885
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Answer:
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