The level of DNA packaging brought about by the formation of nucleosomes looks like beads on a string.
<span> The DNA packaging process includes and describes how DNA is packaged so tightly into chromosomes and squeezed into a tiny nucleus.</span><span>
A </span>nucleosome<span> is a section of </span>DNA that is wrapped around a core of proteins.
Gymnosperms were the first seed plants. They do not make flowers or fruits, so their seeds are unprotected, hence the name gymnosperms which means "naked seed".
These seeds are wind-dispersed pollen that doesn't need water for fertilization.
Alfred Wegener was the scientist who proposed the Continental Drift Theory in the early twentieth century. Simply put, his hypothesis proposed that the continents had once been joined, and over time had drifted apart.<span>
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Answer:
- Autotrophs are usually defined as those that can prepare their own food by carrying out the process of photosynthesis, but heterotrophs cannot prepare their own food and are directly dependent on the autotrophs for food. Examples of autotrophs are plants and trees, and examples of heterotrophs are animals and human beings.
- Autotrophs are the lowest organisms in the trophic level, where they produce the food for the consumers (heterotrophs). On the other hand, the heterotrophs lie above the autotrophs and when they consume their food, they obtain only 10% of the energy, and the remaining energy is released into the environment.
- Autotrophs can make organic substances by the use of inorganic molecules, but heterotrophs cannot make these substances. They are only dependent on the molecules prepared by these autotrophs.
Thus, these are three of the facts regarding autotrophs and heterotrophs existing on earth that are true.
Answer:
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Explanation:
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