Answer:
Seed dormancy is defined as the process in which seed are prevented from germination even though environmental conditions are favoring.
There are several ways in which seed dormancy can be broken. Some of them are as following:
<u>Scarification:</u> scarification is a mechanical technique to breakdown the seed dormancy. In this technique, hard seed coat is removed from the seed under cold temperature.
<u>Hot water treatment: </u>The seed is kept into hot water between the 75 degree to 100 degree, that helps in removal of seed coat and allow germination of plant.
<u>Sodium hypochlorite solutions:</u> sodium hypochlorite (NaOCl) solution breakdown the seed dormancy by decomposing germination inhibitors, increases α-amylase activity and scarifying the seed coat.
Hence, three ways to break seed dormancy are Scarification, Hot water treatment, and Sodium hypochlorite solutions.
I think It would be B because in sounds like the best one in my opinion sorry if I am wrong
Answer:
1. Meiosis I
2. Tetrad
3. Tetrad
Explanation:
Crossing over refers to an event taking place in the cells undergoing meiosis cell division during which the exchange of material takes place. The process of crossing over takes place during pachytene of prophase I in meiosis I.
Crossing over takes place when the structure formed by the pairing of the four chromatids of the chromosomes called tetrad is formed. The formation of tetrad allows the exchange of genetic sequences, therefore, result in recombination.
The process of crossing over does not take place in the mitosis as the tetrad is not formed in the mitosis.
Thus, Meiosis I, Tetrad and tetrad are correct.
Answer: It is lethal without an appropriate explanation. The lack of oxygen and high pressures are a huge risk, also the temperature and radiation.
