Answer:e
Explanation:
1. Acids react with metals to release hydrogen gas
Take some granules of zinc in one glass test tube and magnesium in another glass test tube and magnesium in another glass test tube. Pour dilute hydrochloric acid in one and sulphuric acid in the second. Reaction takes place and a gas is released in each. Test the gas for hydrogen by bringing a bur…
2. Acid reacts with a base (metallic oxide) to form salt and water
HCl + ZnO → ZnCl2 + H2O Acid reacts with an alkali (hydroxide) to form salt and water. HCl + NaOH → NaCl + H2O In these Reactions acid neutralizes the base to form neutral substances like salt and water.
3. Acids reacting with Metals
The reactions of dilute acids with a variety of different metals can be investigated, small fresh samples of metals are placed in 2ml samples of dilute hydrochloric or sulfuric acid. The rate of reaction depends on the 1. Concentration of the acid – if the acid is too dilute the reaction is very slow. 2. Type of metal
<h2>Adaption of genes to improve survival</h2>
Explanation:
- People include varieties inside their heritable characteristics. A few varieties improve an individual fit to endure and replicate in their condition.
- In the event that this proceeds over ages, these ideal adjustments (the heritable highlights that guide endurance and multiplication) will turn out to be increasingly more typical in the populace.
- The populace won't just advance (change in its hereditary cosmetics and acquired characteristics), yet will develop so that it gets adjusted, or more qualified, to its condition.
- The adjustments or changes in conduct, physiology, and structure of a life form to turn out to be increasingly fit to a domain. As per Charles Darwin's hypothesis of development by normal choice, living beings that have heritable characteristics that empower them to all the more likely adjust to their condition contrasted and different individuals from their species will be bound to endure, replicate, and give a greater amount of their qualities to the people to come.
- Hence, the correct answer is "Individuals adapt their genes to improve survival".
Answer:
<u>Antigenic drift</u> refers to the slow accumulation of genetic changes to an influenza virus over time.
Explanation:
Antigenic drift is defined as the mechanism by which viruses undergo variation. This mechanism involves the slow accumulation of mutations in the viral genes, that are responsible for coding the antibody binding sites. This leads to the formation of a new strain of virus, which can't be inhibited by the old antibodies. Due to this, the virus can easily spread the disease.
The antigenic drift occurs in the influenza A virus and also the influenza B viruses.
Therefore, <u>Antigenic drift refers to the slow accumulation of genetic changes to an influenza virus over time.</u>
The answer is O.
Since blood type A and B are codominant, it means that the people who have blood type AB only have genes of A and B. They do not have the gene for blood type O.
We can be sure that the child will not have blood type O by constructing a Punnett square. We can list all the possible genotypes thus predict their phenotypes. The capital letters represent the genotypes of parents, while others are the positive genotypes of offsprings.
![\left[\begin{array}{ccc} &A&B\\A&aa&ab\\B&ab&bb\end{array}\right]](https://tex.z-dn.net/?f=%20%5Cleft%5B%5Cbegin%7Barray%7D%7Bccc%7D%20%20%26A%26B%5C%5CA%26aa%26ab%5C%5CB%26ab%26bb%5Cend%7Barray%7D%5Cright%5D%20)
From this, we can see that the only possible blood types their child could have are A, B, or AB. So, O is not possible.
Answer:
The cells Differentiated
Explanation:
The neutral tube is a precursor to form nervous tissues. Thus, on trnasplantation to another embryo, the transplanted cells differentiated to form nervous tissues.