A student explains the formation of the planetary system as follows. "The birth of the planetary system begins with a rotating cloud called nebula which contains hot gases. When these gases cool, the nebula expands and becomes a flattened disk. Gravitational force causes rings of gases to be left behind when the nebula expands. At the center of the nebula, the gases combine to form the sun and the planets form in the outer flattened portion of the disk.
What is the flaw in the students explanation?
A. The nebula contracts and shrinks instead of expanding
B. The gases in the nebula get heat

Answers

Answer 1

Answer: A. The nebula contracts and shrinks instead of expanding

Nebula is the cloud of interstellar dust and gas that forms a star. It is collborately shaped during colliding and collapsing of the interstellar mediums this is influenced by the gravitational attraction of the atoms and particles in the entites. Hence, there are three types of nebular namely, are classical nebula, diffuse nebula, planetary nebular and supernova remnants.

Related Questions

1.How Can You Classify Single-Celled Organisms?Some of the oldest and most common organisms on Earth consist of only one cell. These single-celled, or unicellular, organisms display all of the characteristics of living things. You might think that all unicellular organisms are very similar, but this is not the case. These fascinating creatures are extremely diverse.What characteristics do you think could be used to classify different kinds of single-celled organisms?
A man heterozygous for blood type A marries a woman heterozygous for blood type B. The chance that their first child will have type O blood is??
Which of the following is most important in classifying two groups of bears into the same genus?A. similar diets B. similar genes C. similar habitat D. similar body size
After Darwin proposed his ideas about natural selection, scientists began trying to test his ideas in a variety of ways. Which of the following best explains why it was important that scientists did this? (2 points)They had to see if this new idea fit the evidence they found in their experiments. They knew they would be left behind by the scientific community if they did not. They needed to discredit Darwin as quickly as possible with contradictory evidence. They were compelled to prove that this new idea was correct and Lamarck was wrong.
Carbon is the basis of all life and is constantly being cycled through ecosystems. In which form is carbon passed along from plants to animals?

Reword the following statement to make it true: Nucleoli are membrane-bounded structures present in the eukaryotic nucleus. A) Nucleoli are two lipid bilayers that surround nucleus in eukaryotic cells.
B) Nucleoli are large protein complexes that cross the nuclear envelope in eukaryotic cells.
C) Nucleoli are thin, dense meshworks of fibers lining the inner surfaces of the inner nuclear membranes of most eukaryotic cells.
D) Nucleoli are structures made of DNA, RNA, and protein that are present in the eukaryotic nucleus.

Answers

Answer:

Option-D

Explanation:

The nucleolus is a structure present in the nucleus of the cell which is important for the cell.

The nucleolus provides the site of transcription of the rRNA genes and the enzymes required for transcription. The nucleoli appear condensed structure as the rRNA genes, some portion of DNA and the proteins in the form of the enzymes like RNA polymerase I.Therefore, nucleoli are made of the DNA, RNA and the proteins.

Thus, Option-D is correct.

Answer: Option D

Explanation:

The nucleolus is the largest structure which is found in the nucleus of the eukaryotic cells. It is the main site for the ribosome biogenesis.

Nucleoli consists of DNA and RNA, proteins and it forms around the nucleolar organizing regions. it also help in cell signaling.

These are like envelops which bounds the nucleus inside it. In case of the treatment of cancer, the main target is nucleolus.

Which part of the scientific method allows biologists to share their findings with other scientists?

Answers

reporting information

Reporting the information.

Plants that have many periods of reproduction are called _____. annuals perennials gametophytes sporophytes

Answers

The answer to the question above is perrenials.
Perrenial plants live for more than a year. Annual plants live only for a year they germinate, grow and bear flowers or seeds but eventually die. while both c and d, (gametophytes and sporophytes) are both phases of plant lifecycle, not a type of plant.

The answer is Perennials.

If I give the lion 2kg of beef, how many kg of protein is he getting from that *beef?
O 12kg
O 1.2kg
120kg

Answers

Answer:

Explanation:

The amount of protein a lion gets from 2kg of beef depends on the protein content of the beef. The protein content of beef can vary, but on average, it is around 20%. To calculate the amount of protein in 2kg of beef, you can multiply the weight of the beef by the protein content:

2kg of beef x 20% protein = 0.4kg of protein

So, the lion would be getting 0.4kg of protein from 2kg of beef.

Remember, the protein content can vary, so it's important to check the specific protein content of the beef you are considering.

Which elements are found in high proportion in earth's crust?

Answers

here's a few: magnesium, oxygen, silicon, phosphate, and aluminum are all found in earth's crust in high proportion. oxygen being the highest proportion of any other element.

The capital city OF ARIZONA is Phoenix.What kind of phrase is "OF ARIZONA"?

A. adverb phrase
B. adjective phrase
C. noun phrase
D. infinitive phrase

Answers

The phrase "of Arizona" is B. an adjective phrase, because it acts as if it were a simple adjective and describes the subject.

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