Answer:
Explanation:
Bands are used in separation of agarose gel during electrophoresis. It helps to separate DNA fragments. DNA strands are negatively charged and are moved towards the anode according to there sizes this creates the bands that is seen. The Bands are viewed ender ultraviolet rays of light.
The bands are usually clear and distinguishable when viewed but smearing could occur and this makes the band lump together.
Answer:
During capillary exchange , red blood cells are the substance that is not sent out to the tissue.
Explanation:
Capillaries have thin walled cell which can only exchange glucose which is a monosaccharide, water molecule, carbondioxide and oxygen gas. These substances are exchanged because they are small in size while red blood cells are not exchanged due to large in size.
Osmosis - the control of letting water pass through our cells
Answer:
Soil erosion causes siltation in rivers, dams, etc. In some areas, huge river deltas are formed (such as River Nile delta) because of soil erosion. Such places are good for agriculture but not good for urbanization. However, some people do not care about it, they just want to construct buildings on alluvium type soils.
Magnetic Field.
Magnetism is a force that can act at a distance. However magnets cannot exert a force on an object that is too far away.
