<span>LD
means lethal dose. LD50 is the amount of a material, administered at once to
cause the death of half (50%) of a group of test organisms. A test which shows that LD50 of a certain
chemical is 20 mg per kg means that 20 milligrams of that chemical for every 1
kilogram body weight of the test animal when administered in one dose, causes
the death of 50% of the test group.</span>
The ecosystem is defined as the stable interaction of biotic and abiotic factors in the surroundings. The intertidal is a zone of ecosystem found between land and water.
<h3>What is the Intertidal Zone of Ecosystem?</h3>
- The intertidal zone is defined as the point or site where the ocean meets the land between high and low tides. The zone can be found at any point where the land meets the ocean.
- The ecosystem found in the intertidal zones are estuaries, tide pools, and salt marshes.
Thus, the intertidal zone supports the ecosystem of marshes, tidal pools, and estuaries.
Learn more about the <u>ecosystem </u>here:
brainly.com/question/1673533
People starting to eat healthy
The inferior vena cava brings deoxygenated blood back into the heart from the lower body. For comparison, the part that directs deoxygenated blood from the upper body is the superior vena cava.
Comparison of meiosis and mitotic cell division. As in the previous figure, only one pair of homologous chromosomes is shown. In meiosis, after DNA replication, two nuclear (and cell) divisions are required to produce the haploid gametes.
