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maw [93]
3 years ago
9

Did humans evolve from neandethals

Biology
1 answer:
Vera_Pavlovna [14]3 years ago
7 0
Fossil and genetic evidence both suggest that Neanderthals and modern humans evolved between 700,000 and 300,000 years ago from a common ancestor
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An international company has 24,900 employees in one country. If this represents 34.8% of the company's employees, how many empl
Brrunno [24]

Answer:

There are a total of <u>71,551 employees</u> in the company.

Explanation:

Let the number of employees in the company be 'x'.

Given:

Number of employees in one country = 24900

As per question:

34.8% of total employees = 24900

⇒ 34.8\%\times x=24900

\frac{34.8}{100}\times x=24900\\\\0.348x=24900\\\\x=\frac{24900}{0.348}\\\\x=71,551.7\approx71,551

So, there are a total of 71,551 employees in the company.

7 0
2 years ago
I’m which situation will two objects each traveling with a speed of 2 m/s have the greatest relative motion?
Bingel [31]
If both of them were travelling anti parallel to each other. (parallel but in opposite directions)
3 0
3 years ago
Explain the thermal properties of water
Zinaida [17]

Answer:

A glance of earth taken from space will depict it blue. This blue colour is actually water, the major part of the earth is covered with water. We need water for almost everything, for example- drinking, bathing, cooking etc and therefore we should know about the properties of water. 65 % human body is composed of water. Water is essential for the survival of life on earth. Water is distributed unevenly on the earth’s surface. It forms a major solvent and dissolves almost every polar solute. So let us have a look at its properties.

Physical properties of water : Water is a colourless and tasteless liquid. The molecules of water have extensive hydrogen bonds resulting in unusual properties in the condensed form. This also leads to high melting and boiling points. As compared to other liquids, water has a higher specific heat, thermal conductivity, surface tension, dipole moment etc. These properties form the reason for its significance in the biosphere. Water is an excellent solvent and therefore it helps in the transportation of ions and molecules required for metabolism. It has a high latent heat of vaporization which helps in the regulation of body temperature

Chemical properties of water: Amphoteric nature:

Water can act as both acid and base, which means that it is amphoteric in nature.

Example:

Acidic Behaviour: H2O(l)+NH3(aq) ⇌ H3O+(aq)+NH+4(aq)

Basic Behavior: H2O(l)+H2S(aq) ⇌ H3O+(aq)+HS−(aq)

Redox reactions:

Electropositive elements reduce water to hydrogen molecule. Thus water is a great source of hydrogen. Let us see an example in this case:

2H2O(l)+2Na(s)→2NaOH(aq)+H2(g)

During the process of photosynthesis, water is oxidized to O2. As water can be oxidized and reduced, it is very useful in redox reactions.

Hydrolysis reaction

Water has a very strong hydrating tendency due to its dielectric constant. It dissolves many ionic compounds. Some covalent and ionic compounds can be hydrolyzed in water.

Explanation:

7 0
2 years ago
What is codominance?
schepotkina [342]
Codominance<span> is a relationship between two versions of a gene. Individuals receive one version of a gene, called an allele, from each parent. If the alleles are different, the dominant allele usually will be expressed, while the effect of the other allele, called recessive, is masked. 

Credit: The internet </span>
7 0
3 years ago
Read 2 more answers
Which characteristic of the outer core makes it unique among the other layers of Earth?
ollegr [7]

Answer:

The outer core is the third layer of the Earth. It is the only liquid layer, and is mainly made up of the metals iron and nickel, as well as small amounts of other substances. ... These powerful currents cause lines of invisible force to stretch around the Earth and thousands of miles into space, creating a magnetic field.

4 0
2 years ago
Read 2 more answers
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