C. A wall of stones and mortar
This would act as a model describing the cell membrane.
Explanation;
A cell membrane is made up of a phospholipid bilayer with embedded proteins.
A cell membrane hold the different components of the cell together and to protect it from the environment outside the cell. It acts as a boundary between the inside environment and the outside environment of a cell.
It regulates the materials that enters and exits the cell; through selective movement of substances in and out of the cell.
Chromosomes are tightly wound strands of DNA.
A complicated substance with significant heterogeneity is trabecular bone. Depending on the anatomical region and with age, its elastic and strength qualities change significantly also sickness.
The relevance of architecture and tissue material qualities is still unclear, despite the fact that these characteristics are highly dependent on density. Interesting facts about the strains the point at which the bone fails is essentially independent of density. Currently being done, there are more sophisticated structure-function relationships that underlie such behavior mechanical characteristics such time-dependent failure, damage, and multiaxial loading accumulation.
The microstructural class of finite element models, especially the "high-resolution" models, offers a special method for investigating such phenomena. With continuing research in this area, it is anticipated that significant understanding will be gained into issues including osteoporosis, bone fracture, bone remodeling, and the design/analysis of bone-implant systems. This article examines the current status of trabecular bone biomechanics, concentrating on the mechanical elements, and makes an effort to pinpoint crucial areas for present and future study.
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The answer for 17 is the germ theory of disease
The answer for 18 is increased soil erosion
The answer for 19 is bubonic plague
The answer for 20 is regenerate
The answer for 21 is historical food of the Incas
The answer for 22 is expansion of arable land
The answer for 23 is microorganisms
The answe for 24 is pollution