The cell theory was developed over many years. What are its four basic concepts?

 which of the standards is a part of cell theory ?  

What is cytoplasmic streaming? What problem for larger cells is addressed by cytoplasmic streaming

The cells of all organisms divide and new cells are created out of the thin air. This is the tenet of the cell theory. True or false ?

There are 4 basic tissues in the human body. For each of the following organs/structures describe the location and function of at least three basic tissues found in them. Heart and stomach You have received GHS 1 million as a scientist to develop a vaccine for corona virus. You have been able to develop the vaccine but now the challenge is how the vaccine will enter the cells of the body when you inject it. From your knowledge of the structure of the cell membrane give and explain 2 features you can exploit in order for the vaccine to go across the cell membrane into the cell.

Imagine you are working in a lab and you examine an unknown cell only to discover it possesses gap junctions and microvilli. Based on those findings, what can you assume regarding its function(s)? O a) it specializes in intercellular communication O b) it can withstand mechanical stress c) it likely functions in absorption O d) A and C O e) B and C

What invention led to the development and refinement of the modern cell theory?

Gap junctions between cells allow direct contact of the cytoplasm between neighboring cells. What kind of cells might you find these in and how do they facilitate the function of these cells?

Is tricellular junction important in cell junction specification? https://en.wikipedia.org/wiki/Cell_junction#:~:text=Cell%20junctions%20(or%20intercellular%20bridges,the%20extracellular%20matrix%20in%20animals.

You have been asked to do a strucutural study to understand how increasing cell surface area affects cell size, cell shape and functions. What cell type would help you most efficiently observe the effects of increasing surface area?  Choices:  A. Monocytes from the blood serum. Monocytes are largely roughly spherical cells.  B. Red Blood cells from the bone marrow. The shape of Red blood cells is a biconcave disk and looks like a donut. C. Stem cells from skin. In this case assume a skin stem cell is flat and plate like.  D. Microvilli covered cells from the intestines. Microvilli are tiny hair like protrusions in the plasma membrane of intestinal cells that increase the absorption of nutrients in the intestines.