The discovery of mitochondria (mtDNA) had no effect on the study of cork bark. Thus, the correct option is D.
Mitochondria may be defined as a rod-shaped cell organelle found in the cytoplasm of the cell. It is a double membrane-bound cell organelle that is known as the powerhouse of the cell.
This is because the energy required for various metabolic activities is released by the mitochondria in the form of ATP. It also helps in the cellular respiration and formation of the cell.
The origin of mitochondria and chloroplast is described by the endosymbiotic theory. Based on the evolutionary aspect, mitochondria and chloroplast both originated due to endosymbiotic theory.
Inheritance research and forensic science also deal with the discovery of mitochondria. While the corb bark of the plants generally contains dead cells with no nucleus and other membrane-bound cells. So, it does not deal with the discovery of mitochondria.
Therefore, the discovery of mitochondria (mtDNA) had no effect on the study of cork bark. Thus, the correct option is D.
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The study of cork bark had no effect on the mitochondrial DNA (mtDNA).
Further Explanation:
Mitochondria are predominantly present in the eukaryotes. They are not present in single-cell organelles such as RBC (which lacks nucleus). They consist of very small circular mitochondrial DNA. It passes the genetic information from one parent to a new offspring. The DNA of the cytoplasmic organelles is inherited in a non-Mendelian manner. It is generally accepted that mostly in animal cells, mitochondrial DNA is passed on solely by the oocyte of the mitochondria.
Endosymbiotic theory describes the origin of chloroplasts and mitochondria.On the evolutionary basis, mitochondria and chloroplast both originated due to endosymbiotic theory. Barkand corks are an outer component of plants.The bark is mainly made up of cork cambium, cork, cortex, and phelloderm. Cork barks are dead cells of the plant, and their mitochondrial DNA is not involved in metabolic processes.
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Answer Details:
Grade: High School
Subjects: Biology
Chapter: Cell organelle
Keywords:
Mitochondrial DNA, chloroplast, cork, barks, non-Mendelian, oocytes, mitochondria, circular, single-cell, animal cell, RBC, nucleus.
B. a few kilometers below Earth’s surface.
C. just below Earth’s surface.
D. on Earth’s surfac
Most metamorphic processes take place B. a few kilometers below Earth’s surface.
Metamorphism is the change of minerals or geologic texture in pre-existing rocks without the protolith melting into liquid magma. Metamorphism often occurs on two scales: contact and regional. Contact metamorphism occurs locally in areas adjacent to igneous intrusions or in areas that are in contact with hot water known as hydrothermal fluids. Whereas regional metamorphism occurs over much larger areas such as rising mountain ranges, large igneous intrusions can form and warp overlying strata increasing the pressures above the intrusion. Regional metamorphism usually produces foliated rocks such as gneiss and schist.
There are other ways that metamorphic rocks can form, Dynamic metamorphism. Dynamic Metamorphism also occurs because of mountain-building. The huge forces of heat and pressure cause the rocks to be bent, folded, crushed, flattened, and sheared.
Metamorphic rocks form when increased heat and pressure force physical changes in the crystalline structure of an existing rock. Under the right conditions, any type of rock can become a metamorphic rock including igneous rocks, sedimentary rocks, and even other metamorphic rocks. Therefore metamorphic processes result due to intense heat and high pressure below the Earth's surface.
Grade: 9
Subject: biology
Chapter: metamorphic processes
Keywords: metamorphic processes
Most metamorphic process takes place a few kilometres below Earth’s surface. The metamorphic process occurs due to the presence of intense heat and high pressure below the surface of Earth.
Further Explanation:
The metamorphism of rocks is due to either due to the physical or chemical alteration by dense heat and high pressure exhibited by a sedimentary or igneous material into a denser form. Rocks are compacted into a smaller volume of space due to actions of tectonic plates, presence of shearing forces for a more extended period, stress and compression. All these factors play an essential role in the wrapping and deformation of rocks.
Due to this, the metamorphic rocks are denser than the original sedimentary material. So such rocks are less susceptible to breakdown due to erosion. The process of metamorphism is also influenced by chemically active fluids that are circulated around the newly forming rock and also introduce different ions results in the formation of a new and different mineral.
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Answer Details:
Grade: High School
Subject: Biology
Topic: Minerals and Rocks
Keywords:
Metamorphic rocks, erosion, sedimentary rocks, rocks, igneous rocks, minerals, chemicals, lava, temperature, pressure.
B. the parent animal divides into two new animals
C. the offspring develops as an outgrowth of the parents body wall.
D.an egg develops without being fertilized by a sperm
Parthenogenesis is a method of reproduction in which an egg develops without being fertilized by a sperm. The correct option is D.
An unfertilizedegg produces a child without the help of male gametes (sperm) in this type of asexualreproduction.
Since they only receive geneticmaterial from the female parent, parthenogenesis produces kids that are often genetically identical to or very similar to the parents.
Numerous creatures, including certain invertebrates, reptiles, and even some fish and birds, exhibit this mode of reproduction.
Without mating or geneticrecombination, offsprings can be produced due to parthenogenesis.
Thus, the correct option is D.
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internal fertilization
conjugation
pollination
Solution:
An act of fertilization in which genetic information is transferred between cells is called conjugation.
Image result for What is conjugation in science?en.wikipedia.org
Conjugation is the process by which one bacterium transfers genetic material to another through direct contact. During conjugation, one bacterium serves as the donor of the genetic material, and the other serves as the recipient.
This is the required answer.
An act of fertilization in which genetic information is transferred between cells is called conjugation.
Conjugation is the transfer of genetic material between bacterial cells by direct cell-to-cell contact or by a bridge-like connection between two cells.[1] This takes place through pilus
Answer:
the cell wall, chloroplasts
Explanation:
plant cells have a cell wall, but animal cells do not
plant cells also have chloroplast, but animal cells don't