B)troposphere
C)stratosphere
D)thermosphere
The stratosphere is the second layer of the atmosphere, and it is located between the troposphere and the mesosphere. The stratosphere is where the ozone layer is located. Hence option C is correct.
The ozone layer is a region of the stratosphere that contains a high concentration of ozone gas. Ozone is a molecule that is made up of three oxygen atoms. The ozone layer is important because it absorbs harmful ultraviolet radiation from the sun.
The troposphere is the lowest layer of the atmosphere, and it is where most of Earth's weather occurs. The mesosphere is the third layer of the atmosphere, and it is located above the stratosphere. The thermosphere is the fourth layer of the atmosphere, and it is located above the mesosphere.
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Answer:
First of all i love your profile pic. Answer its he Ozone is concentrated in Stratosphere. About 90% of the stratosphere is concentrated with ozone. Remaining ozone in the lower region is Troposphere.
Explanation:
The answer is C.
The type of immunity that provides lifetime immunity for the body against a specific pathogen is called acquired immunity. It is also referred to as adaptive or specific immunity.
Acquired immunity is not present at birth. it is learned. As a person's immune system encounters foreign substances (antigens) the components of acquired immunity learn the best way to attack each antigen and begin to develop a memory for that antigen. Acquired immunity is also called specific immunity because it tailors its attack to a specific antigen previously encountered. Its uniqueness lies in its ability to learn, adapt and remember.
Acquired immunity takes time to develop after first exposure to a new antigen. However afterward, the antigen is remembered, and subsequent responses to that antigen are quicker and more effective than those that occurred after first exposure. Memory of a particular antigen is kept by the B and T lymphocytes.
The factors are: The size of the sample, the extraction method, the method of purification and preservation of the DNA.
The quantity and quality of DNA can be greatly improved by performing PCR.
* Purification of nucleic acids is a key step for functional studies in biology. Because of the great diversity of living organisms in nature, purification becomes a real challenge for researchers, especially cell lysis.
The evolution of lysis methods has made it possible to improve efficiency, speed and simplicity. But, this lysis step remains a crucial step for the efficiency and the quality of the purification.
The alternation of generations inthe life cycle of a plant includes the diploid and haploid multicellularstages. diploid and haploid are copies of the chromosomes. The spores in theplant is unicellular and when they start dividing through mitosis, it producesidentical cells. These identical cells are all haploid. Haploid stages containone set of chromosome from either of the parent. These identical cells create amulticellular system called the gametophytes. A gametophyte is the haploid multicellularstage in the life cycle of a plant. The gametophyte makes the gametes. These gametesare responsible for sexual fertilization. It takes place when a sperm (malegametes) from the male fuses into the egg cell (female gametes) of the female. The formation of both male and female gametes creates a diploidzygote. Diploid stages contain one set of chromosome from eachparent. This is where the sporophyte comes in. A sporophyte is the diploidmulticellular stage in the life cycle of the plant. It now contains the twosets of chromosomes from each parent.
A downward arching rock layer is called syncline.
Explanation:
Syncline and anticline are words used to design folds based on the analogous ages of folded rock layers. A syncline is a fold in which the modern rocks happen in the core of a fold. Where rock layers have been changed prior to folding, such as by folding about a giant fold with a shallowly inclined axial surface, the dearest rocks now occur in the core of folds where layers slide towards the fold axis.
A downward arching rocklayer is called a syncline. It is a type of fold that is characterized by its downward-facing axis.
Synclines are typically formed when sedimentary rocks are subjected to compressional forces. The compressional forces cause the rocks to bend, forming the downward-facing axis.
Synclines are often found in sedimentary basins, which are areas where sediment has accumulated over time. The sediment is typically deposited in horizontal layers, but the compressional forces can cause the layers to bend, forming synclines.
Synclines can be identified by their characteristic shape. They are typically bowl-shaped, with the axis of the fold running through the center of the bowl.
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