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Mandarinka [93]
3 years ago
6

What are the basic shapes into which astronomers classify most galaxies?

Biology
2 answers:
eduard3 years ago
8 0
<h2>Answer:</h2>

Astronomers usually classify galaxies in three basic shapes which are spiral, elliptical, and irregular

<h2>Explanation:</h2>

Galaxy is a system of millions or billions of stars, together with gas and dust, held together by gravitational attraction. Galaxies exist in many different sizes, shapes and brightness. They may exist alone or in larger groups called clusters. Galaxies are divided into three basic types: spirals, elliptical and irregulars. The Milky Way is a spiral galaxy where we live.

kirill [66]3 years ago
5 0
Sprial, elliptical and irregular...
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4 years ago
Would cephalization be an advantage to jellyfish? why or why not?
inna [77]

Answer:

Cephalization does not confer an advantage to free-floating or sea organisms. Many aquatic species display radial symmetry like the jelly fish for instance.

Aquatic animals are not cephalized because they must be able to find food, take caution and defend themselves from harm from all directions.

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3 years ago
A 0.2 M solution of NaCl contains ________ g of NaCl in 1 l of ________.
Maksim231197 [3]

Answer:

11.7 g in 1 L of water.

Explanation:

Molarity (M) or Molar concentration is a measure used in chemistry for solutes in a solution.

It is defined as mol/ L (number of moles per litre).

0,2 M means we have 0,2 mol/ L

In order to know how many grams this means we need to look up the molecular weight of the solute. In this case NaCl: 58.443 g/mol

\frac{1 mol NaCl}{58.443 g} = \frac{0.2 mol}{X g}

X= \frac{(0.2 mol x 58.433 g}{1 mol}

X= 11.69 g

The solution has 11.69 g of NaCl in 1 L of water since its an adequate polar solvent for NaCl dissolution.

8 0
3 years ago
What happened to the greenish warbler birds as they migrated from the southern portion of their range up around the Tibetan Plat
kozerog [31]

Answer:

The correct answer is - option A. They evolved separately as they moved north and became two separate species

Explanation:

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They migrated from the southern part of these birds range and moved north and evolved separately from the main species and become two distinct species due to their geolocation and environment change.

3 0
4 years ago
How are alleles for dominant traits represented
muminat

Answer:

Capital letters

Explanation:

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4 0
4 years ago
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