Answer - A
The ratio of a child with clear skin with that of freckled skin is 1:2.
When genotype rr mates with genotype Rr, the following genotypes are expected:
Rr = clear skin dominant
rr= freckled skin
The sodium hydroxide solution and vegetable oil underwent a chemical change.
<h3><u>Explanation:</u></h3>
The reaction between a base and a fat or fatty acid is called as saponification reaction. Here the base dissociates into the cation and hydroxyl ion. The hydrogen from the fatty acid of the oil reacts with the hydroxyl ion to form water which is basically the neutralization reaction. This cation now reacts with the rest of the fatty acid to form a bipolar molecule which is the soap. During the reaction, the solution becomes cloudy but with time, it again goes back to solution. The cloudyness appears because oil isn't soluble in water based solutions and the base is actually made solution in water.
Here the sodium hydroxide reacts with oil to form water and the soap molecule which is a chemical change.
Answer:
1. Cell Wall
2. Amount of Vacuoles
3. Plastids
4. Size
5. Plasmodesmata
Explanation:
1. Animal Cells dont have cell wall, while Plant Cells do.
2. Animal Cells contain many/ multiple vacuoles, while Plant Cells only contain one.
3. Animal Cells dont have plastids, Plant Cells do have (eg. Chloroplasts)
4. Animal Cells are larger in comparison to Plant Cells
5. Animal Cells dont have plasmodesmata while Plant Cells do have.
Answer:
2 and 4
Explanation:
Those eat things to become secondary
The correct answer is D. Bird flu.
Polio and smallpox are very rare today as they were eradicated hundreds of years ago and TB has been around for maybe thousands of years. Bird f!u was discovered in 1957.
