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ANEK [815]
3 years ago
9

Researchers studied mice embryos to determine whether the cells of the ear bones originated from the same embryonic cells as the

cells that form the jaw in other vertebrates. Why would the researchers use mice instead of opossums or humans? Do the results from mice tell you something about your own ears? Why or why not?
Biology
1 answer:
Rina8888 [55]3 years ago
8 0

The researchers will use mice instead of opossums or humans to determine whether the cells of the ear bones originated from the same embryonic cells as the cells that form the jaw in other vertebrates because in this type of experiment, organisms that are ideal are the ones that have a short life span, easy to be researched on and easy to mantain.

It will be very tedious and demanding to use opossums and humans in this type of practical experiment because,it is against the culture and norms guilding human living and existence to use humans as model organisms,opossums as well are very bad model organisms because unlike the mice,opossums are long lived and it will be very difficult to raise and maintain an opossum in a laboratory.

Humans and mice are both mammals just that human is a higher mammal but they share similar features in terms of pattern of development,though there is a clear difference during their early development,so because of the common ancestry shared by the mice and humans,the result of the experiment on the mice with share a close similarity with the pattern that is expected in humans.

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1. Elements have only 1 type of atoms

2. Atomic Number

3. Atomic Mass

4. Isotopes

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Explanation:

An element is a pure chemical substance made of same type of atom.

Elements are distinguished by their name, symbol, atomic number, melting point, boiling point, density and ionization energies. In the Periodic Table, elements are arranged according to their atomic number and they are grouped according to similar chemical properties and are depicted by their symbols.

<em>1. Elements have only 1 type of atoms</em>

<em>2. Atomic Number</em>= Number of protons is also indicative of electric charge or number of electrons present in the nucleus which determines chemical properties of the element.

<em>3. Atomic Mass</em>= the atomic mass of the element which is the total number of protons and neutrons in the nucleus of an atom of the element.

<em>4. Isotopes</em>= isotopes of an element have the same number of protons in their nucleus but differ in the number of neutrons. Naturally occurring elements have more than one stable isotope. Thus isotopes have similar chemical properties (due to same number of protons) but different nuclear properties (due to different number of neutrons).

<em>5. Allotropes</em>= atoms of an element can form bonds with each other in more than one way leading to difference in their chemical properties

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3 years ago
What does the formula for table salt indicate about that compound?
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It indicates what elements is composed by and how many atoms of one element are linked to the other.

For example, this is the formula for table salt is:

NaCl

The formula indicates that table salt (sodium chloride) is composed by sodium (Na) and chlorine (Cl) on a 1:1 ratio.


Hope it helped,


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