Answer: Phosphorous
Explanation:
Phosphorus and Nitrogen are similar in nature as they have 5 electrons in the outermost shell. Nitrogen and phosphorous belong to the same family on the periodic table.
As phosphorus lies just below nitrogen the characteristics of both the elements will be similar.
They are found abundant on earth and are cycle by biogeochemical cycle.
Answer:
According to Darwin's theory of evolution, new species evolved as a result of natural selection.
Explanation:
- Darwin proposed that speciation could readily occur through the prolonged action of Natural selection.
- Natural selection allows the 'survival of the fittest' i.e. a more fit organism will have a better chance of survival than the less fit one.
- The result of Natural selection could be positive,negative or balancing.
- Evolutionary process in which the genetic changes confer a higher fitness to increase frequency of the organism over time in population is called positive selection.
- Evolutionary process in which genetic changes decreases the organism's fitness resulting in its disappearance from the population is called Negative selection.
- It may happen that a mutation benefits hetero-zygotes but not homo-zygotes and alleles maintain a intermediate frequency in population.This evolutionary process is called balancing selection.
To calculate this we will use the light equation:
λ
We have Frequency
.
We know that speed of light in vacuum is
.
Since a unit of speed of light is m/s, we can change the unit of frequency Hz to 1/s, since Hz means cycles per second (f=1/T).
So:
<span>
</span>
<span>
λ
</span>⇒ λ
⇒ λ
⇒ <span>λ</span>
Chromosomes are thread-like structures located inside the nucleus of animal and plant cells. Each chromosome is made of protein and a single molecule of deoxyribonucleic acid (DNA<span>). Passed from parents to offspring, </span>DNA<span> contains the specific instructions that make each type of living creature unique.</span>
The type of bond that are show in the diagram above is option C which is metallic bond and it is a chemical bond or electrostatic force of attractions that exist between conducted electrons in metal ions.
<h3>What is metallic bond?</h3>
Metallic bond is a form of chemical bond or force of electrostatic attractions that exist between the positively charged metal ions which give room for conduction of electricity or heat.
This type of bond only occur in metallic substances or objects alone. This is characterized by high boiling and melting points.
Therefore, The type of bond that are show in the diagram above is option C which is metallic bond and it is a chemical bond or electrostatic force of attractions that exist between conducted electrons in metal ions.
Learn more about metallic bond below.
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