Differentiation in plants refers to the processes by which distinct cell types arise from precursor cells and become different from each other. Plants have about a dozen basic cell types that are required for everyday functioning and survival. Additional cell types are required for sexual reproduction. While the basic diversity of plant cell types is low compared to animals, these cells are strikingly different. For example, some cells such as parenchyma cells retain the potential to respond to environmental and/or hormonal signals throughout their life and, under the right conditions, can be transformed into another cell type (transdifferentiation). Other cells such as the water-conducting vessel elements undergo cell death as part of their differentiation pathway and thus can never transdifferentiate to another cell type
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The answer is C, since antibiotics will not effect viruses, only bacterial infections.
Answer:
A) its elliptical orbit and tilt on its axis
Explanation:
Earth revolves around the sun in an elliptical path. Its axis is tilted to about 23.5° from the vertical.
These two factors determine the global climate on the Earth.
Due to elliptical orbit, the earth is sometimes closer to sun than the rest of the time. When it is closer the global temperature rises by 5 degrees. Due to the tilt of the Earth, seasons occur. The hemisphere which points towards the sun has summers where as which points away has winters.
Thus, the long-term climate change is effected by elliptical orbit and tilt of the axis.
Since this theoretical organism called a "superfly" does not die and has unlimited resources, the type of population growth for this particular species will be exponential. In plotting the graph of exponential growth, a J-shaped curve will be the result, starting from a steady logarithmic increase then eventually being vertical.
Helicases move along one strand of the duplex and push the opposing strand aside. They either migrate in the 3'-5' or 5'-3' orientation along the DNA or RNA (some can move in either direction).
- Living things need helicases, which are enzymes, to separate the double-stranded DNA in this instance from other nucleic acid strands.
- Helicases accomplish this by severing the hydrogen bonds that link the two strands.
- The DNA double helix's two strands are initially separated by an enzyme known as a DNA helicase.
- Each DnaB helicase winds the parental duplex by encircling one strand of the duplex DNA and moving in the 5′ to 3′ direction with respect to this ssDNA.
- Primers are created on occasion when DnaB interacts with primase.
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