Hypotonic solutions are lowly concentrated solutions
Hypertonic are highly concentrated solutions
While isotonic have equally concentrated
When a cell is placed in a hypotonic sol water moves out of the cell by osmosis making the cell flaccid
Answer:
(d) Cell wall
Explanation:
The cell wall is a structure located on the outside of the cell membrane in the cells of plants, bacteria, fungi, and algae. It is a resistant, tough and flexible layer, which has the vital function of supporting the osmotic pressure inside the cell, preventing the cell from lysis when water enters. Besides, it has the function of giving rigidity, support and defining the shape of the cell.
Learning that occurs
when an organism makes a connection between two events is called "Associative
learning".<span>
The process involves associating various details or events to
learn a particular fact or information. For example one cannot imagine one eye
of his/her father, whenever he/she will imagine the whole face of their father
will make sense to mind and not single eye.</span>
Answer:
22:- in mitosis stem cells and somatic cells cell division occurs and in meoisis germ cells cell division occurs
23:- at end of mitosis 2 daughter cells formed and meiosis 4 daughter cells formed
24:- in mitosis cells are same and in meiosis cells are different
l know only those questions answers
Answer:
Air pollution harms human health and the environment. In Europe, emissions of many air pollutants have decreased substantially over the past decades, resulting in improved air quality across the region. However, air pollutant concentrations are still too high, and air quality problems persist. A significant proportion of Europe’s population live in areas, especially cities, where exceedances of air quality standards occur: ozone, nitrogen dioxide and particulate matter (PM) pollution pose serious health risks. Several countries have exceeded one or more of their 2010 emission limits for four important air pollutants. Reducing air pollution therefore remains important.
Air pollution is a local, pan-European and hemispheric issue. Air pollutants released in one country may be transported in the atmosphere, contributing to or resulting in poor air quality elsewhere.
Particulate matter, nitrogen dioxide and ground-level ozone, are now generally recognised as the three pollutants that most significantly affect human health. Long-term and peak exposures to these pollutants range in severity of impact, from impairing the respiratory system to premature death. Around 90 % of city dwellers in Europe are exposed to pollutants at concentrations higher than the air quality levels deemed harmful to health. For example, fine particulate matter (PM2.5) in air has been estimated to reduce life expectancy in the EU by more than eight months. Benzo(a)pyrene is a carcinogenic pollutant of increasing concern, with concentrations being above the threshold set to protect human health in several urban areas, especially in central and eastern Europe.
"Air pollution is causing damage to human health and ecosystems. Large parts of the population do not live in a healthy environment, according to current standards. To get on to a sustainable path, Europe will have to be ambitious and go beyond current legislation."
Explanation:
