Question

given what you know about cells and cell theory, explain where ribosomes come from and consider whether you think that ribosome structure in the first cell differed from existing ribosomes. you can think about it in two ways: 1. where did you get the ribosomes in your very first cell. (right after sperm and egg fused together to make you as a zygote.) 2. where did ribosomes come from in the first ever cell. this journal has no entries. use the function above to add one!

Explanation:

1. In the context of a newly - formed zygote (after sperm - egg fusion), ribosomes are contributed by the egg cell. The egg is a large cell that contains a significant amount of cytoplasm with pre - existing ribosomes, mRNA, and other cellular components necessary for early embryonic development.
2. For the first ever cell, according to the RNA - world hypothesis and theories of the origin of life, ribosomes (or their precursors) likely emerged through a series of chemical reactions and self - assembly processes. Simple organic molecules combined over time to form more complex structures, and ribosomes, which are crucial for protein synthesis, may have evolved from simpler RNA - based catalytic structures (ribozymes).

Answer:

1. In the first cell after sperm and egg fusion, ribosomes come from the egg cell.
2. In the first ever cell, ribosomes likely originated from self - assembling organic molecules and the evolution of RNA - based catalytic structures.