El hielo flota porque es menos denso que el agua líquida. Cuando se forma hielo, ocupa aproximadamente un 9% más de espacio del que ocupaba como líquido. Por lo tanto, un recipiente de 1 litro de hielo pesa menos que un recipiente de 1 litro de agua líquida y el material más liviano flota hacia
Explanation:
Plants also have adapted to the Arctic tundra by developing the ability to grow under a layer of snow, to carry out photosynthesis in extremely cold temperatures, and for flowering plants, to produce flowers quickly once summer begins. A small leaf structure is another physical adaptation that helps plants survive. Plants lose water through their leaf surface. By producing small leaves the plant is more able to retain the moisture it has stored.
<span>i think this could help When the surface of the soil is frozen, most plants die because they cannot get water and nutrients from the soil because of their *structures* hint are too short to get past the frozen layer. What plant structure brings nutrients and water to the plant from the soil? </span>
Transposable elements are considered to be responsible for vast range of genome diversity and gene silencing.
Explanation:
Transposable elements are short sequences of DNA that have the ability to move from one location to another in the genome. During this process they copy themselves.
The entire process carried out by transposable elements to copy themselves and move from one location to another is called transposition.
Transposition may result in mutation and is potentially a major source of genome diversity and change. If a transposon inserts itself into the coding region of a gene,it interrupts the coding sequence and inactivates the gene expression.
In addition to this, a transposable element may contain transcription or translation termination signal that will block the gene expression downstream of insertion site.
