Cell theory was proposed by Schleiden and Schwann in 1839, providing fundamental insights into cells and their relationship with organisms. Schleiden examined plants, while Schwann focused on animals.
Explanation:
Theodor Schwann, a German physiologist and physician, made numerous scientific contributions. His notable discoveries include Schwann cells within neurons, the pepsin enzyme in the stomach, and the cell theory. Schwann’s research on animals revealed that their bodies consist of various cells and their products, just like plants. Thus, in 1839, he and Matthias Schleiden articulated cell theory, which posits that all living organisms are made of one or more cells and that these cells serve as the structural and functional units of life. In the 1950s, Rudolf Virchow added that cells emerge only from existing cells.
Response:
The answer is option-D.
Rationale:
Darwin is renowned for his evolution theory, which he developed after gathering various plant and animal specimens during his travels.
He noticed both the similarities and differences in the morphological traits of species found in the regions he explored. From his observations, he posited that traits are inherited from parents and that species evolve over time, a process known as descent with modification.
One significant piece of evidence supporting his theory was his observation of plant species in South America, which were more similar to those found in tropical regions of South America than to the temperate species in Europe, given the similar habitats.
Therefore, option-D is indeed the right choice.
Answer:
If Jimmy finds that he performs better with someone other than Joe, then Joe could be contributing to Jimmy's lower scores.
b responding variable
Explanation:
Conditional statements are used in scientific hypotheses.
