The important point is that the surface area to the volume ratio gets smaller as the cell gets larger and as volume increases, surface area to volume ratio decreases. The larger a cell, the less easily it can get rid of waste and it also has more trouble getting water, nutrients and gases in. That is why we do not see giant cells. Instead we see multiple cells in larger organisms.
One way to increase surface area is to flatten the cell. That is why red blood cells are flat discs, instead of spheres. Another way is elongation. That is why many bacteria are rod shaped, and why neurons are elongated. In fact, the human body relies on the same principle to adapt to climate. Long tall and lean folks with long arms and legs live in East Africa, because such shapes increase surface area to get rid of excess body heat to avoid heat strokes. Europeans and Asians adapted to cold climates, in contrast, have shorter arms and legs and rounder torsos to minimize surface area. to conserve body heat.
Blood plasma transports nutrients, waste (like uric acid, creatinine, and ammonium salts), albumin (protein), and electrolytes.
Answer:
Sandstone does not react with Hydrochloric acid. The acid soaks into the rock because the rock is porous, filled with tiny holes. It is made up of tiny grains of sand cemented together by intense pressure.
Answer:
color
Soil can be described based on its color (yellow brown red), how light or dark it is, and how intense the color is.
Texture
Ranges from bolder size pieces to very fine clay
Structure
Describes the shape of soil clumps and how the soil particles are held together. It can look grainy, blocky, or prism shaped.
Consistency
Hardness or softness of soil measuered by its consitstency varies with moisture for example some soils have soft, slippery consiststency when there moist.
Infiltration
How fast water enters soil
Soil moisture
Amount of water in soil pours is its moisture contents scientits detemine weight loss by drying samples in a oven at 100c the weight difference is the amount mouisture in the soil
