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hoa [83]
2 years ago
11

List Kepler's laws and give a brief description of each law.

Biology
1 answer:
user100 [1]2 years ago
4 0
1) The law of orbits. This is when all planets move in elliptical orbits, with the sun at once focus.

2) The law of areas. A line that connects a planet to the sun sweeps out equal areas in equal times.

3) The law of periods. The square of the period of any planet is proportional to the cube of semimajor axis of its orbit. 

These laws were derived for orbits around the sun, but they apply to satellite orbits also. I hope this helps! ~Mia
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7 0
3 years ago
A cell with 80 chromosomes undergoes meiosis. How many chromosomes are found in the daughter cells? How many daughter cells are
qwelly [4]

Answer:

Four daughter cells are produced each with 40 chromosomes. The daughter cells would exhibit genetic variations and would not be genetically identical to each other.

Explanation:

Meiosis is a cell division that forms four daughter cells from one parent cell as two sequential division meiosis I and meiosis II do not include any DNA replication between them. Crossing over during prophase-I of meiosis-I includes the exchange of genetic segments and occurs between the homologous chromosomes. It produces new gene combinations in the daughter cells which were otherwise not present in the parent cell.

Since there is no DNA replication between meiosis I and meiosis II, the daughter cells have half the number of the chromosomes compared to the parent cell. This occurs as homologous chromosomes move towards the opposite pole during anaphase I.

Therefore, a parent cell with 80 chromosomes will make a total of 4 daughter cells by meiosis. Each daughter cell would have 40 chromosomes. These daughter cells would have some new gene combinations and would be genetically dissimilar among themselves.  

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3 years ago
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3 0
3 years ago
Which statement best describes the components of nucleic acids?
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Answer:

Which statement best describes the components of nucleic acids?

They are made up of nitrogenous bases, sugars, and phosphates.

Explanation:

9 0
3 years ago
The process by which a cell divides is called
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The best answer is C


The process by which a cell divides is called mitosis. It results in two daughter cells that are genetically identical to each other and to the original cell.

Multicellular organisms,  depend on mitosis for growth and repair. Organisms repair some of their tissues  using mitosis to regenerate new cells. Not all cells undergo mitosis at the same rate. In man, brain cells are much more difficult to regenerate than cheek cells which are constantly being replaced.


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3 years ago
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