Answer:
Global warming and human activities (using fossil fuels and green house gases)
Answer:
Why is aerogel blue? The sky, glaciers and aerogel all have tiny particles or bubbles that scatter light.
Explanation:
Answer:
Nuclear envelop disintegration does not take place before the start of mitosis.
Explanation:
Mitosis is the process in which one cell divides into two daughter cells. In eukaryotes, somatic cells divide by mitosis and are identical to parent cells.
Before the start of mitosis, cells are in the interphase in which the cell's DNA material become double by replicating, cells organelle proliferates and the cell grows in size.
Prophage is the first stage of mitosis in which the genetic material becomes condense to chromosomes, mitotic spindles start developing, the nucleolus becomes disappear and nuclear membrane disintegrates.
Therefore nuclear envelop disintegration occurs during the first stage of mitosis, not before mitosis.
Answer:
In most grassland ecosystems, fire is the primary mode of decomposition
Explanation:
Grasslands burn more readily than forest and shrub ecosystems, with the fire moving through the stems and leaves of herbaceous plants and only lightly heating the underlying soil, even in cases of high intensity. In most grassland ecosystems, fire is the primary mode of decomposition, making it crucial in the recycling of nutrients. In some grassland systems, fire only became the primary mode of decomposition after the disappearance of large migratory herds of browsing or grazing megafauna driven by predator pressure. In the absence of functional communities of large migratory herds of herbivorous megafauna and attendant predators, overuse of fire to maintain grassland ecosystems may lead to excessive oxidation, loss of carbon, and desertification in susceptible climates. Some grassland ecosystems respond poorly to fire.
