Providing examples explain how sexual reproduction in plants has evolved to become less dependent on water.

~Gymnosperms have developed over the course of its evolution, structures that solved the main limitations present in the Pteridophytes in relation to sexual reproduction, and in the terrestrial environment.

~The organisms that have adapted fully to the terrestrial environment feature adaptations in body to retain water, thus avoiding dehydration.

~ @ Pteridophytes:Vascular tissue: water and minerals & organic
 material.
Vascular tissue: increasing efficiency in transport of water & mineral salts with increased plant growth.Dependence on water for fertilization with anterozoides furniture.

There are four nitrogenous bases that make up dna. the two pyramidines are thymine and cytosine. the two purines are adenine and guanine. these bases pair in a very specific way. adenine - thymineguanine - cytosine i remember it like this: a tall, good cat.