Answer:
The correct option is<em> b. at each step, energy is lost from the system</em>
Explanation:
The amount of energy that travels from one trophic level to another is known to declines at each level. Infact, only 10% of the energy travels from one trophic level to another.
This is because most of the energy is lost by the organisms at each trophic level. It is due to the metabolic processes which occur in the organisms of each trophic level and most of the energy is lost as heat.
Antibiotics are medicines used to treat infections caused by bacteria. Antibiotics don't work against infections caused by viruses, such as colds and flu. ... This is called antibiotic resistance and it happens when bacteria are exposed to antibiotics and learn to resist them.
1)<span>Under the pressure of its own weight and the forces of gravity, a glacierwill begin to move, or flow, outwards and downwards. Valley glaciers flow down valleys, and continental ice sheets flow outward in all directions.
2)</span> at the shoreline, wind causes waves which contributes to significant erosion
hope it helps
Answer:
A DNA molecule consists of two long polynucleotide chains composed of four types of nucleotide subunits. Each of these chains is known as a DNA chain, or a DNA strand. Hydrogen bonds between the base portions of the nucleotides hold the two chains together (Figure 4-3).
