Gymnosperms reproduce with cones, while angiosperms reproduce with flowers
these reproduction processes both include pollen
Answer:
Polymer of nucleotides is acidic in nature due to phosphate groups.
Explanation:
Nucleic acids are polymers of nucleotides. Each of the nucleotides contains one nitrogenous base, a pentose sugar, and a phosphate group. The polymerization of nucleotides occurs by the formation of phosphodiester bonds between them. The sugar-phosphate backbone with alternating sugar and phosphate groups is exposed to the surrounding medium while the nitrogenous bases are stacked upon each other in the interior away from the watery medium.
The phosphate groups are completely ionized and bear negative charge at the neutral pH making the polymer of nucleotide acidic in nature. The alkaline nitrogenous bases are not exposed and stacked towards the interior of the helix.
También contienen fibras de tejido conectivo que les aporta su elasticidad característica. En el epitelio alveolar se pueden distinguir células planas de tipo I y células en forma de cubo del tipo II. Su función principal es mediar el intercambio gaseoso entre el aire y la sangre.
Amino acid is building block of protein ;)
