Hello,
If a new body of evidence were found that directly contradicted the cell theory, groups of scientists would then start formulating new theories.
Step two of this process would be the insertion of an isolated donor DNA fragment goes into a vector genome
Toe nails are made of keratin
Answer:
Option A
Explanation:
It was discovered in the letters of both lyell and darwin that people before them believed that Earth is a few thousand years old, and populations are unchanging.
Reference:
Zuidema, H. P. (1947). Discovery of Letters by Lyell and Darwin. The Journal of Geology, 55(5), 439-445.
An individual's major depressive disorder is most likely to be characterized by a constant sense of melancholy or a lack of interest in external stimuli.
<h3>What is depressive disorder?</h3>
Depressive disorder is a mood disorder characterized by persistent sorrow and loss of interest. Clinical depression, often referred to as major depressive disorder, has an impact on your emotions, thoughts, and behavior and can result in a variety of mental and physical problems. You could periodically feel like life isn't worth living and find it difficult to go about your everyday chores.
You can't suddenly "snap out" of depression; it's more complicated than a bout of the blues. Depression could require long-term therapy. However, don't give up. The majority of depressed people experience less severe symptoms thanks to medication, counseling, or both.
To learn more about depressive disorder with the help of given link:
brainly.com/question/12743811
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