Describe the major contributions of hooke and leeuwenhoek to cell biology

Robert hooke: Discovery of cells; observed cells for first time, used the term "cell".

Anton van Leeuwenhoek: first to observe living cells.

Explanation:

Robert Hooke was an English scientist who examined a piece of cork and observed the dead cells of cork. He used the term cells to describe the empty chambers of cork as he observed. Since he observed the dead cells, the cells were empty and did not have any organelles.

Anton van Leeuwenhoek was the first one to observe the living cells with help of lens made by him. He used the lens to magnify the image. He was observed bacterial, blood and sperm cells. He also observed protists and was among the first scientists to observe the presence of cells in animals.

hey, i believe your answer would be d. sugar ribose and the base uracil. i believe this is the answer, because rna consists of sugar ribose, adenine, guanine, cytosine, and uracil.

your first option is incorrect, because that's dna. where it consists of sugar deoxyribose, adenine, guanine, cytosine and thymine.

your second option is also incorrect, this is because sugar deoxyribose is in dna, and uracil is in rna. these two do not make sense together.

your third option being incorrect, because sugar ribose is in rna, but not the base of thymine. rna consists of uracil, not thymine.

lastly your fourth option being correct! this answer is correct, because both sugar ribose, and the base uracil are in rna! ~

answer is d. sugar ribose and the base uracil.