Answer:
to help and determine the exact age of the rocks
Explanation:
The study of rocks strata is known as stratigraphy. It is useful and helps the scientist and the researcher to study the earth's crust and its past.
Scientist could age the rock using two methods. They are :
Relative ages
Absolute ages
Early scientist could determine the exact age of the rock of the earth's crust. They use to find the relative ages of the layers of the rocks and then determine how one rock layer is older or younger than the other. But with advancement and development of carbon dating, scientist could tell the exact age of the rocks found on the earth's crust.
The Scientists uses the relative as well as the absolute dating technique to date the rock layers. They organize the rock layers based on their age and scale from the oldest to the youngest on a geologic time scale. So an exact date of the rocks can be determine by using the two methods of relative age and the absolute age.
Answer:
1. Cork Cambium
2. Vascular Cambium.
3. Xylem cells ; Phloem cells
4. Xylem cells
5. Xylem cells
Explanation:
In plants, growth is characterized by the elongation of the stem and roots. Woody plants also gradually increase is girth throughout their life times. Plant growth is divided into two types depending upon the two growth dimensions (height and width):
Primary Growth:
The elongation or increase in the lengths of the stem and roots is termed as primary growth. Primary growth occurs due to the rapid cell division at the shoot and root apical meristems. This rapid growth of the apical buds is called apical dominance and it prevents the development of lateral buds.
Secondary Growth:
Secondary growth is the increase in the thickness or width of the plant. This occurs due to the growth of lateral meristems i.e. the vascular cambium and cork cambium (in woody plants). Stem thickening occurs through the division of the vascular cambium located outside of the primary xylem and inside of the primary phloem. This division leads to the formation of the secondary xylem and phloem. The cells of the secondary xylem contain lignin and form the "woody" portion of the plant.
In woody plants, the cork cambium is the outermost lateral meristem and produces cork cells that provide strength and hardiness.
It is possible to INCREASE the levels of the protein X by transcription factor binding and epigenetic modifications that induce the expression of the protein-coding gene.
<h3>What are transcription factors?</h3>
Transcription factors can be defined as specific proteins that bind to certain gene regions called promotors in order to promote the transcription of genes.
Moreover, epigenetic modifications such as DNA methylation and histone acetylation may alter the structure of chromatin in order to enable gene transcription.
In conclusion, it is possible to INCREASE the levels of the protein X by transcription factor binding and epigenetic modifications that induce the expression of the protein-coding gene.
Learn more about transcription factors here:
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Restrictions enzyme, also called restriction endonuclease, a protein produced by bacteria that cleaves DNA at specific sites along the molecule. In the bacterial cell, restriction enzymes cleave foreign DNA, thus eliminating infecting organisms.
The right answer is C
The Cuyahoga-river has been designated as one of the American Heritage Rivers. This river is also famous for having, in 1969, literally caught fire.
This combustion, related to the dumping of flammable and toxic products (fire-hazard products) in this river, it was a trigger in the ecological awareness in the United States (and also outside the USA).