Eukaryotic cells have specific membrane bounded organelles to perform various specific functions.
Eukaryotic cells are cells that have a true membrane-bound nucleus and other membrane bound organelles (organized and specialized structures) that perform various functions within the cell. The organelles include; nucleus (the most important organelle and the control center of the cell), ribosomes (which arranges enzymes and other proteins based on the information found in the DNA code), endoplasmic reticulum (which is the site of cellular chemical reactions), Golgi apparatus, vacuoles (which serves as temporary storage sites), lysosomes, and mitochondria (which is responsible for making the cell’s main energy-carrying molecule).
The last common ancestor of gymnosperms and angiosperms possessed the same characters such as pollen, seeds, and vascular tissue.
<h3>What are angiosperms and gymnosperms?</h3>
The gymnosperms are a group of plant that are known as seed- producing plants such as Ginkgo, gnetophytes, cycads etc.
Angiosperms are the plant that produces flowers and having seeds enclosed within their fruit.
Gymnosperms have no production of flowers and fruits and they contain seeds without cover on the surface of their leaves.
Therefore,last common ancestor of gymnosperms and angiosperms possessed the same characters such as pollen, seeds, and vascular tissue.
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<h2>The Drought Continues </h2>
As the drought continues, all crops, minerals and nutrients will be lessened. If it continues then it will cause severe shortage of food for humans and animals which can cause even death. There is a strong contest for lack of food and water.
Food will become limited. Animals will coordinate how they get nutrients. Seed is the deciding constituent for the development of the birds’ beaks.
Larger G. Fortis will have clash with G. Magnirostris for the best available food that is the large seeds. Severe drought can cause death of many G. Magnirostris and G. Fortis that contain large beaks also comprise the big bird origins.
Consequently the result of this would be the beaking of G. Fortis that will ultimately become more small. In presentation it would be in size that they can avail food which is currently avaiable.
The species of <em>Anthoxanthum odoratum</em> is an example of parapatric species.
- Speciation is a process in which a new species form from the existing species due to reproductive isolation.
- In parapatric speciation there is no barrier between the gene flow between similar species.
- In the parapatric speciation populations are adapted to different ecological conditions although the populations of the related species differ in terms of mutation, and due to the effect of drift.
- But they are connected by the random flow of genes between the neighboring organisms irrespective of the changes in their genetic and physiological form.
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