Because it has to be that way
Prokaryotes don’t have any membrane bound-organelles but they have DNA, a cell membrane and ribosomes
Within this
body part, lymph acquires particles that help immune system function. According
to Merriam dictionary, immune system is defined as “the bodily system that protects the body
from foreign substances, cells, and tissues by producing the immune response
and that includes especially the thymus, spleen, lymph nodes, special deposits
of lymphoid tissue (as in the gastrointestinal tract and bone marrow),
macrophages, lymphocytes including the B cells and T cells, and antibodies.”
<span> </span>
The Ras protein found in tumors usually cause which of the following events to occur excessive cell division.
<h3>How does Ras oncogene contribute to cancer?</h3>
Ras genes codes for proteins that can drive cancer when mutated.
All Ras proteins are GTPases which work as molecular regulators in the cell, controlling signaling pathways and other interactions.
Thus, option "A" is correct.
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<span>A) Archaea and Cyanobacteria is you answer im prity sure</span>
