Answer:
Gas exchange is the physical process by which gases move passively by diffusion across a surface. For example, this surface might be the air/water interface of a water body, the surface of a gas bubble in a liquid, a gas-permeable membrane, or a biological membrane that forms the boundary between an organism and its extracellular environment.
Gases are constantly consumed and produced by cellular and metabolic reactions in most living things, so an efficient system for gas exchange between, ultimately, the interior of the cell(s) and the external environment is required. Small, particularly unicellular organisms, such as bacteria and protozoa, have a high surface-area to volume ratio. In these creatures the gas exchange membrane is typically the cell membrane. Some small multicellular organisms, such as flatworms, are also able to perform sufficient gas exchange across the skin or cuticle that surrounds their bodies. However, in most larger organisms, which have a small surface-area to volume ratios, specialised structures with convoluted surfaces such as gills, pulmonary alveoli and spongy mesophyll provide the large area needed for effective gas exchange. These convoluted surfaces may sometimes be internalised into the body of the organism. This is the case with the alveoli, which form the inner surface of the mammalian lung, the spongy mesophyll, which is found inside the leaves of some kinds of plant, or the gills of those molluscs that have them, which are found in the mantle cavity.
Explanation:
I hope this helps u ^_^
For the first one is 1 and the other one is gaseous water
Answer: Fluorescence in situ hybridization (FISH)
Explanation:
Fluorescence in situ hybridization (FISH) is a powerful technique used in the detection of chromosomal abnormalities. Fluorescence in situ Hybridization, is a technique used to detect the presence of specific groups of Bacteria and Archaea microbes.The fluorescent dye allows the cell to be observed under a microscope. The technique allows for the direct quantification of specific types of Bacteria and Archaea in microbial populations without the need to culture the cells in growth media. Only living cells containing sufficient rRNA are detected by FISH. FISH requires no prior knowledge of the environmental conditions of the system..
Can you please include the pairs?
Answer:
Multicellular organism, an organism composed of many cells, which are to varying degrees integrated and independent.
Explanation:
