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mariarad [96]
3 years ago
14

What are covalent bonds???

Biology
2 answers:
iris [78.8K]3 years ago
7 0
A covalent bond is a chemical bond which involves the sharing of atoms.
tester [92]3 years ago
4 0
A chemical bond that involves the sharing of electron pairs between atoms.
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Unlike in prokaryotic cells, replication in eukaryotic cells...
Kitty [74]
The answer is B) can start in many different places in a sequence at the same time.
These different places are called Origin of replication. :)))
i hope this is helpful
have a nice day  
4 0
3 years ago
Naturally occurring solid mixture of one or more minerals and organic matter
alina1380 [7]

The naturally occurring solid mixture of one or more minerals and organic matter is known as a Rock.

A rock is a naturally occurring substances that is a solid mixture of one or more minerals together with organic matter.

<h2>Further Explanation;</h2>
  • Rocks are classified based on the chemical composition, texture and the way they are formed.  One type of rock may change from one form to another through a rock cycle.
  • Rock cycle is the process through each various rocks change from one form to another, normally an interchange between the three major types of rocks.

There are three major classification of rocks:

<h3>Sedimentary rocks </h3>
  • Sedimentary rocks are types of rocks that are formed through accumulation of sediments at low temperatures in tectonic layers and sinks. These sediments includes; pebbles, shells, sand and other material fragments.  
  • The sediments accumulates in layers and then harden into rocks over a period of time.
  • Examples of sedimentary rocks include; limestone and conglomerate
<h3>Metamorphic rocks</h3>
  • These are types of rocks that are formed as a result of changes that occurs due to intense heat and pressure under the surface of the earth. They result from action of heat and pressure on other rocks that pre-existed.
  • These types of rocks are characterized by shiny crystals, ribbon-like layers among other features.
  • Examples of metamorphic rocks are marble and gneiss

<h3>Igneous rocks </h3>
  • These are types of rocks that are formed as a result hardening and cooling of magma from volcanic eruptions. Magma may cool inside the earth or when on the surface of the earth as a result of volcanic eruptions. The lava from this eruptions cools and hardens to form metamorphic rocks.
  • Igneous rocks are glass-like and shiny with no crystals. They may also have tiny spaces and holes due to gas bubbles trapped during the cooling process.
  • Examples of igneous rocks include obsidian and basalt.
  • The three types of rocks may be further classified in terms of chemical composition, texture and formation.

Key words: Rocks, types of rocks, chemical composition

<h3>Learn more about;</h3>
  1. Rocks and rock types; https://brainly.in/question/5987245
  2. sedimentary rocks; https://brainly.in/question/3259075
  3. igneous rocks; https://brainly.in/question/272012
  4. metamorphic rocks; https://brainly.in/question/1206219

Level; High school

Subject: Geography

Topic:  Rocks

sub-topic: classification of rocks

4 0
3 years ago
Ot Waste products, like carbon dioxide, leave cells through the
Gala2k [10]
<h3>Answer:</h3>

<em>LETTER </em><em>C</em>

Explanation:

MAKE ME BRAINLIEST AND FOLLOW ME

6 0
2 years ago
What did Schleidan contribute to the cell theory?
ale4655 [162]
He found a nuclear structure (cells) in plants by looking through a microscope

7 0
3 years ago
If a DNA molecule has 24% adenine, what is the percentage of guanine in the same DNA molecule?
artcher [175]

Answer:

26%

Explanation:

Adenine pairs with thymine.

Guanine pairs with cytosine.

If 24% of the DNA molecule is adenine, that means that there is 24% thymine. This is because they pair together so they have to be equal. That is 48% of the DNA molecule. To find the percentage of guanine, we need to minus 48% from the total 100%.

100 - 48 = 52

Then divide by 2 because you have guanine AND cytosine.

52/2 = 26

Therefore, your final answer is 26% of guanine is in the DNA molecule.

<em>I hope this helps!!</em>

<em>- Kay :)</em>

5 0
2 years ago
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