LD50 or TD50: it is the Lethal Dose 50 (to refer to animals), and Toxic
Dose 50 (to refer to the human being). To refer to animals is: the dose of a
drug, a drug (generally a substance) that kills 50% of a population. To
refer to the human being: it is the dose of a drug, a medicine (in general a
substance) that produces toxicity to 50% of a population.<span>
<span>Find the LD50, it is very important to determine the
dose in which the drug produces toxic effects and thus be able to approach or
deduce the effective dose, that in cases of administering a new drug to the
human being, it is necessary to find the effective dose 50 (Dose of the drug
that produces a therapeutic effect to 50% of the population) in order to
determine the Therapeutic Margin or Therapeutic Index.</span></span>
Answer:
Anatomy. Species may share similar physical features because the feature was present in a common ancestor (homologous structures).
Molecular biology. DNA and the genetic code reflect the shared ancestry of life ...
Biogeography ...
Fossils ...
Direct observation
Explanation:
This is the <span>Fayum </span>depression. Here, fossil evidence of a primate ancestor<span> was found predating the divergence between </span>hominoids<span> (apes and </span>humans<span>) and </span>cercopithecids<span> (Old World monkeys). The fossil of a single species </span><span>lived around 30 million years ago in modern-day Egypt and resembled the current New-World monkeys. </span>
Based on the map, it can be concluded that more states experienced higher numbers of immigration than emigration.
<h3>Migration</h3>
Looking at the map closely, the number of states or territories that experienced population loss are fewer than those that experienced a positive population change.
A loss in population means that more people emigrated as compared to those that immigrated.
A positive change to the population size means that immigration is more than emigration.
More on population migration can be found here: brainly.com/question/8296413
Answer: Water. The pH level is 7.
Explanation: The scale has values ranging from zero (the most acidic) to 14 (the most basic). As you can see from the pH scale above, pure water has a pH value of 7. This value is considered neutral—neither acidic or basic.
