I’m pretty sure the answer is air pollution
<span>The answer is interconnected. You will come to find that everything that makes life possible on earth is all interconnected. It is just like the way all the human activities and necessities for the everyday life are all interconnected to nature. Hope this answers the question.</span>
If, while examining a human karyotype, it is observed that there are 22 paired chromosomes and two chromosomes that are not the same size, this would most likely be due to mutation.
<h3>What is mutation?</h3>
Mutation is any change in the nucleotide or chromosomal sequence of a genome.
There are different types of mutation and they include;
- Deletion mutation
- Translocation mutation
- Insertion mutation
According to this question, a human karyotype was observed to have 22 paired chromosomes and two chromosomes that are not the same size.
This observation is likely caused by a mutation that caused the pairing of unequal sized chromosomes.
Learn more about mutation at: brainly.com/question/17106056
Answer:
Five hundred out of every one thousand rats would die
Explanation:
Median lethal dose LD-50 (lethal dose 50%) is used as a measure of poisoning potential of a substance. LD-50 is the dose of substance, given all at once, which causes the death of 50% (one half) of a group of test animals. LD-50 is usually expressed as the amount of chemical administered (e.g., milligrams) per 100 grams or per kilogram of the body weight of the test animal. In this example, the test animals were rats, they were administrated a certain insecticide. Administration methods that are the most common are dermal (applied to the skin) and oral (given by mouth). If the determined LD-50 is 250 milligrams per kilogram of body mass, it means that one half (five hundred) of one thousand rats would die, because we are talking about lethal doses.
