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valkas [14]
3 years ago
11

Which characteristics describe a spiral galaxy?

Biology
2 answers:
Vaselesa [24]3 years ago
7 0
The large majority of spiral galaxies are flat, rotating disks. Within the disk, there are stars, dust, and gas. The disk also contains spiral arms and a central concentration of stars known as the bulge of the galaxy.
Vikki [24]3 years ago
5 0

Answer:

Spiral galaxies are named after their morphology because they have a clear spiral structure around their nucleus when viewed perpendicular to their plane. In censuses they appear as the most common typology.

The spiral galaxies have young and old stars, suggesting that they did not form from another older galaxy or from an ancient clash between two galaxies. In the nucleus there is a predominance of older stars and in the arms there is a greater activity of star formation. In this way, the nuclei of the spiral galaxies have a more orange hue and the arms a more blue hue.

Spiral galaxies have diameters ranging from 20,000 light years to over 100,000 light years. Its masses are estimated to range from 10 billion to 10 trillion times the mass of the Sun. The Milky Way, where the solar system is located, is a large and massive spiral galaxy.

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Define each of the terms in your own words. Do not copy the definition of the word from the glossary of your book. The goal of t
True [87]

Answer:

Gene: The hereditary material made up of alleles.

Alleles: The alternative forms of a gene.

Dominant: An allele or trait that masks the effect of recessive allele or trait.

Recessive: An allele or trait that gets suppressed by the dominant allele or trait.

genotype: The genome of a particular organism of the genes which make up an organism.

phenotype: The physical traits or characteristics of an organism.

test- cross: A cross in which the dominant and the recessive trait offsprings are crossed to depict whether the dominant organism is homozygous or heterozygous.

law of independent assortment: Alleles of different genes get assorted independently into gametes.

law of segregation: allele pairs segregate during gamete formation and unite at the time of fertilization.

product rule: Independent evens can be calculated by multiplying the independent probabilities.

Addition rule: The probability which shows that one event would occur in a mutually exclusive event.

co-dominant: When the dominant and the recessive trait occur and the organism shows both the characteristics of the dominant and the recessive trait.

incomplete dominance: when the dominant trait is not fully dominant over the recessive trait. As a result, individuals are produced which show neither the dominant or the recessive trait. A new trait is developed in them.

Explanation:

5 0
3 years ago
Describe the relationship among producer, herbivore and carnivore.
olasank [31]
The herbivore eats plant and the carnivore it’s meat each one eats one specific thing meaning that on a food feb as long as they keep doing what they are doing it doesn’t mess the environment around them
7 0
3 years ago
How and why might the R0 value change over time during an outbreak? pls help
Stolb23 [73]

Answer:

Vaccinations

Explanation:

For example, if a disease has an R0 of 18, a person who has the disease will transmit it to an average of 18 other people. That replication will continue if no one has been vaccinated against the disease or is already immune to it in their community. So if you have (for example) a vaccination then you're less likely to get it, resulting in a lower R0

6 0
2 years ago
Applying this learning to yourself. Identify a time when you might have resented feeling enclosed, but the offer of choices impr
aivan3 [116]

A time when I have resented feeling enclosed was : When I was trapped in an elevator due to power outage.

<h3 /><h3>What is the fear of enclosure </h3>

The fear of enclosure is known as Claustrophobia ( an anxiety disorder ) and this disorder is present in individuals scared of being in enclosures such as elevators and in crowded rooms. Someone with such disorder ( Claustrophobia ) will tend to avoid enclosures. when I resented feeling enclosed I was assured of getting me out of the enclosure ( elevators ) as power was returned almost immediately and this improved my outlook.

In conclusion  A time when I have resented feeling enclosed was : When I was trapped in an elevator due to power outage

Learn more about Cure for Fear of Enclosure : brainly.com/question/7799156

#SPJ1

5 0
2 years ago
How many bones are in the human ear?
Ostrovityanka [42]
The ear has the tinest bones in the body. There are three bones in the ear. Hopes this helps you.
5 0
3 years ago
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