I think the answer is trees
LD50 is used to express TOXICITY OF TOXINS AND POISONS.
LD50 stands for Lethal Dose 50. This is the standard measure of the toxicity of a material, which will kill half of the sample population of a particular test animal in a defined time period, when they are exposed to the material.
All mackerel live in the water because all fish live in water and mackerel is a fish
Answer:
<em>When a baby is born, the zygote has become about </em><em><u>26 </u></em><em>billion cells</em>
Explanation:
Cell: Cell is defined as the structural and functional unit of living thing. I.e The cell is the simplest and the basic unit of life. All living things are made of cell.
Zygote: A zygote is a single cell formed from the union of a male cell called sperm and a female cell called egg.
<em>When a baby is born, the zygote has become about </em><em><u>26 </u></em><em>billion cells</em>
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Systematics is the study of the units of biodiversity. Systematics differs from ecology in that the latter is concerned with the interactions of individuals (and therefore species) in a particular time.