Answer:
DNA has double helical structure in which the two strands run antiparallel and are connected through complementary base pair
Explanation:
Some of the physical properties of DNA are
a) It comprises of two strands that attaches with each other in a spiral helical manner thereby giving it a double-stranded helical structure
b) The two strand join each other through complementary base pairing in which A pairs with T and C pairs with G.
c) There is a phosphate group at 5' end and a hydroxyl group at 3' end.
d) Strands are antiparallel as one of the strand run in 5′to 3′direction and the other runs in a 3′ to 5′ direction.
A )<span>Does a ball roll farther on the sidewalk than it does on the grass</span>
Answer: An example of a specific case is when a skin lesion occurs. Through mitosis, new skin cells are generated to repair damaged tissue. These cells have to be genetically identical to each other. The spindle fibers are structures formed by microtubules extending from one pole to another to orient the duplicated chromosomes in the spindle, bringing them to the position they occupy during metaphase.
Explanation:
Mitosis is a process of cell division that occurs in eukaryotic cells, i.e. cells that have a nucleus where their genetic material is located. This process generates two identical cells with the same DNA, that is, with two identical nuclei, so it does not provide genetic variability except in case of specific mutations. The objective of mitosis is cell multiplication while preserving genetic information. But in general, in mitosis there is an equal distribution of the cell nucleus as well as the rest of the cell content.
The phases of mitosis are as follows:
- Interface: The cell duplicates its organelles and its DNA to have twice everything before division.
- Prophase: The nuclear membrane breaks, the chromosomes condense, the centrosome duplicates and migrates to the opposite poles of the cell forming microtubules. Also, fibers of the mitotic spindle are formed.
- Prometaphase: The microtubules invade the space where the genetic material is.
- Metaphase: The replicated chromosomes line up in the middle of the cell, called the equatorial plane.
- Anaphase: Microtubules separate chromosomes towards the opposite poles.
- Telophase: The nuclear envelope is re-formed from the remaining fragments of the original.
- Cytokinesis: A cleavage groove is created in the common cytoplasm of the two new cells where the chromosomes were aligned. The cytoplasm is thus strangled until the membrane allows total separation.
<u>Mitosis is then a cellular process that occurs in multicellular organisms to repair damaged tissue, or for growth or development.</u> An example of a specific case is when a skin lesion occurs. When a person suffers an injury, many reactions take place in the repair process to repair the damage including inflammatory, proliferative, and remodeling phases. <u>Through mitosis, new skin cells are generated to repair damaged tissue. These cells have to be genetically identical to each other, to have the same genetic fingerprint and the same function.</u>
The spindle fibers are structures formed by microtubules extending from one pole to another. The kinetochore microtubules attach to the kinetochore, a structure that forms at the centromere of each duplicated chromosome, <u>and orient the duplicated chromosomes in the spindle, bringing them to the position they occupy during metaphase and attracting the newly separated chromosomes to the poles during anaphase</u>.
Answer:
1. Wind is an important element when it comes to current weather and predicting future forecasts. Wind transports moisture and temperature from one area to another, therefore weather conditions change with the shift of wind direction.
2.All plants and animals, including humans, are exposed to the dangers of solar UV radiation; it can cause significant damage to plants, as seen in crop yield reduction and leaf burn, and can damage animal skin health.
3.sun-light is a key energy source for all plants. Through a process called photosynthesis, plants absorb energy from the sun, which fuels the processes necessary for survival.
4.The Sun warms our planet, heating the surface, the oceans and the atmosphere. This energy to the atmosphere is one of the primary drivers our weather. Our climate is also strongly affected by the amount of solar radiation received at Earth.
Explanation:
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