Answer:
Greenhouse gases from human activities are the most significant driver of observed climate change since the mid-20th century.1 The indicators in this chapter characterize emissions of the major greenhouse gases resulting from human activities, the concentrations of these gases in the atmosphere, and how emissions and concentrations have changed over time. When comparing emissions of different gases, these indicators use a concept called “global warming potential” to convert amounts of other gases into carbon dioxide equivalents.
Explanation:
Why does it matter?
As greenhouse gas emissions from human activities increase, they build up in the atmosphere and warm the climate, leading to many other changes around the world—in the atmosphere, on land, and in the oceans. The indicators in other chapters of this report illustrate many of these changes, which have both positive and negative effects on people, society, and the environment—including plants and animals. Because many of the major greenhouse gases stay in the atmosphere for tens to hundreds of years after being released, their warming effects on the climate persist over a long time and can therefore affect both present and future generations.
Answer:
it will have taken hundreds of scientists many years to build and improve; ... is just an extension of weather forecasting, but focusing on changes over ... It remains one of the great mathematical challenges
Explanation:
Answer:
Hormonal effects in newborns occur because in the womb, babies are exposed to many chemicals (hormones) that are in the mother's bloodstream. After birth, the infants are no longer exposed to these hormones
Explanation:
Answer:
No. The bee may travel to a different species of plant, so the pollen may not fertilize another flower. The wind can blow the dandelion seeds into an area where they can’t sprout. The squirrel might come back for the seeds it buried in the ground.
This can be answered with the help of describing osmosis and diffusion in plants. The motion of molecules through the semi-permeable membrane is osmosis. In diffusion, motion of molecules is direct and does not need a semi-permeable membrane.
Explanation:
- In plants, osmosis help plants to absorb water from soil. Diffusion is the process by which carbon dioxide diffuses to the leaves and then to the cells.
- The genetic modifications in some of the plants can help in survive and adopt the osmosis in a very dry environment. They develop defense methods to handle the water loss. Some plants in a permanent dry environment like desert have special structures like reduced leaves, sunken stomata, and so on to conserve water.
- Osmosis happens only in liquid medium. Diffusion happens in any medium - solid, liquid, and gases.
