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solniwko [45]
3 years ago
13

Which of the following is not a common sign of a possible chemical reaction?

Biology
1 answer:
stepladder [879]3 years ago
8 0
The answer is <span>C. Change in odor.

There are several signs of chemical reaction:
1. Dissolved precipitate.
2. Formation of gas (bubbles).
3. Change of color.
4. Change of temperature (warming or cooling).
5. Production of energy.

Among these signs, there is no change in odor, which is, thus, the right choice.</span>
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which type of cell division (mitosis v meiosis) increases the likelihood of variation with a species? explain how it happens?
kipiarov [429]
Meiosis Bc it is genetic variation and ends with 4 cells with a completely different genetic make up whole mitosis is the cell division of identical cells. It ends with two daughter cells.
5 0
3 years ago
I dii ok not under stand this please help me!
satela [25.4K]

Answer:Answer:

For 1: The correct answer is Model 1, 2, and 4.

For 2: The correct answer is Option 1.

Explanation:

For 1:

An element has 3 subatomic particles: electrons (E), neutrons (N) and protons (P).

Atomic number is defined as the number of protons or number of electrons.

Atoms having same number of protons are same. From the given models, Model 1, 2 and 4 have 2 protons with different neutrons. Hence, these models belong to same element.

For 2:

A compound is defined as a substance in which two or more types of elements combine in a fixed ratio. For Example:  is a compound made out of atoms of carbon and oxygen.

Hence, the correct answer is Option 2.

7 0
3 years ago
Megan observes four cells under a microscope and makes sketches of them as shown. Identify whether the cells are prokaryotic or
posledela
I cannot found the images of the microscopy anywhere. But I can explain how you can differentiate a procaryote from a eucaryote under a microscope.

The first difference between them is the size of the cell. eucaryotes are generally much bigger than procaryotes. Procaryotes are visible only at x100 objective, but eucaryotes are visible starting from the x10 zoom.

The second difference is the presence of a nucleus in eukaryotes and the absence of it in procaryotes.

The third difference is the presence of organelles in eukaryotes and the presence of a cell wall in procaryotes (only visible at electronic microscopy).
4 0
3 years ago
PLZ HELP ASAP WILL GIVE BRAINLIST!
sweet [91]

Answer:

Prokaryotes are organisms that consist of a single prokaryotic cell. Eukaryotic cells are found in plants, animals, fungi, and protists. They range from 10–100 μm in diameter, and their DNA is contained within a membrane-bound nucleus. Eukaryotes are organisms containing eukaryotic cells.

Explanation:

7 0
3 years ago
Read 2 more answers
A membrane which surrounds the genetic material and nucleus in eukaryotes cells
Alenkasestr [34]

i think it is called the nuclear envelope, but I am not sure...


Hope this helped :)

4 0
3 years ago
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