The given statement is False.
The bacterial cells walls are composed of peptidoglycan, also known as murein. It comprises polysaccharide chains cross-linked by unusual peptides, involving D-amino acids. The bacterial cell walls are distinct from cell walls of fungi and plants that are made up of chitin and cellulose, respectively.
The cell walls in bacteria allow small molecules to pass through them freely, however, do not permit large molecules to pass through them, in this manner, it function as a coarse filter.
The main function of the cells wall is to sustain the shape of the cell and inhibit the cell from bursting due to osmotic pressure. The cell wall allows the components to pass, which are essential for bacterial nutrition.
Small intestine is modified due to the presence of micro villi which has ability to increase it's size
Im not sure but i believe it could be C
Answer:
Robert Hazen’s studied enviromental and biological processes that might have been critical for life, and also for the formation of approximately two-thirds of Earth's mineral species (see Hazen et al., 2008; Gonzalez & Richards 2020)
.
Explanation:
Hazen provided evidence about how first organic molecules were generated on the primitive earth millions of years ago. He observed that high-pressure hydrothermal vents may provide food for underwater ecosystems. It represents a piece of critical evidence on the origin of life.
You can read these articles that are certainly clarifying in the description of his experiments and discoveries:
1- Hazen, R. M., Papineau, D., Bleeker, W., Downs, R. T., Ferry, J. M., McCoy, T. J., ... & Yang, H. (2008). Mineral evolution. American Mineralogist, 93(11-12), 1693-1720.
2- Gonzalez, G., & Richards, J. W. (2020). The privileged planet: how our place in the cosmos is designed for discovery. Gateway Editions.
The process for connecting two monomers together is called dehydration synthesis. Dehydration means
“removal of water” and synthesis means “to join together”. So in this
process, two monomers are covalently bonded by the removal of a
water molecule. Each organic monomer has a hydroxyl group on
one side and a hydrogen on the other. When two monomers line
up side by side, they will have these two functional groups facing one
another. The H and the OH will break off of their respective
monomers and bond forming a water molecule. This is the dehydration
part of the process. Each monomer now has a carbon atom that needs
to covalently bond with something, so they bind to each other forming
a polymer. That is the synthesis part of the process.
