<span>When the cell needs a nutrient, molecules of that nutrient have to pass through the cell membrane and get to the center of the cell. When the cell is bigger (more volume), the center of the cell is further away from the membrane, and that makes more difficult for the cell to use the nutrients that have got in. When the cell is longer (more area), there is more membrane, so the molecules have more possible places from which they can get inside the cell. So this process is easier when the cells are long and small, which is when the rate Area/Volume is very small. You can compare this with cooking a hamburger: if it's too thick, it may end with a raw center and a burned surface - that's because the heat is having some issues getting to the center of the hamburger.</span>
One reason why the other birds that couldn't compete with the honey creepers fared better on other islands is because the other islands didn't have the honey creepers. There was also enough food on the other islands for the other breeds of birds. The birds were also adapted to the other islands like the honey creepers were adapted to theirs.
Answer:
carbohydrates, lipids, proteins, and nucleotides
Explanation:
carbohydrates, lipids, proteins, and nucleotides are compounds essential to the human body.
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answered by aurinda
hope it helps:)
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Answer:
When seen on a Wright-stained peripheral blood film, a young red cell that has just extruded (lost its) nucleus is referred to as a polychromatophilic cell.
Explanation:
On Wright-stained smears, slightly immature red cells that do not have nuclei (reticulocyte stage) look blue-gray because they still have some ribonucleic acid in them (RNA). These cells are commonly referred to as polychromatophilic cells. Most of the time, polychromatophilic cells are bigger than mature red cells, and their blue-gray color makes them different from macrocytes. Polychromatophilic red cells also tend to lack the central pallor.
When the remaining mRNA and ribosomes are stained with supravital dyes, they make the red cells look like a "reticular" mesh network. This is how the name "reticulocyte" came about. It is to be noted that not all reticulocytes show up as polychromatophils when stained with Wright-Giemsa.
Learn more about peripheral blood smear here:
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