Unlike the biblical account, the Quran mentions only one tree in Eden, also called the tree of immortality, which Allah specifically forbade to Adam and Eve. In other words, there is no tree of knowledge in the Quran. The tree in Quran in general is used as an example for a concept, idea, way of life or code of life. A good concept/idea is represented as a good tree and a bad idea/concept is represented as a bad tree. When Satan appeared before Adam and Eve, he revealed that the only reason God forbade them the fruit of the tree was, that they should not become Angels to live forever and have power over all creatures.The collection of plants in the Quran is published in the article titled “Plants in the Quran”. It is also worth to mention that it is not known what sort of three was there in the Eden. Not the Bible nor Quran identifies the forbidden fruit. So, the word “apple” is not mentioned anywhere. Let’s see the Bible:

⁹ The LORD God made all kinds of trees grow out of the ground—trees that were pleasing to the eye and good for food. In the middle of the garden were the tree of life and the tree of the knowledge of good and evil. (Genesis 2:9)

²²And the LORD God said, “The man has now become like one of us, knowing good and evil. He must not be allowed to reach out his hand and take also from the tree of life and eat, and live forever.” ²³So the LORD God banished him from the Garden of Eden to work the ground from which he had been taken. ²⁴After he drove the man out, he placed on the east side[a] of the Garden of Eden cherubim and a flaming sword flashing back and forth to guard the way to the tree of life.
(Genesis 3:22-24)
Here we can read about two trees, the description is narrative.
Let’s see the Quran:

But Satan whispered evil to him: he said, "O Adam! shall I lead thee to the Tree of Eternity and to a kingdom that never decays?" (Quran 20:120)

The suggestion of Satan is clever, as it always is: it is false, and at the same time plausible. It is false, because; - that felicity was not temporary, like the life of this world, and - they were supreme in the Garden, and a "kingdom" such as was dangled before them would only add to their sorrows. It was plausible, because; - nothing had been said to them about Eternity, as the opposite of Eternity was not yet known, and - the sweets of Power arise from the savor of Self, and Self is an alluring (if false) attraction that misleads the Will.

This scene is seen in several places, in different contexts, but there is always one tree which is the tree of immortality. In the Quran, man’s weakness is at the center of the event when the ego dominates him/her. It has never been uttered by Allah that this tree belongs to immortality, which is able to do this or that! This is only uttered only by the Satan. Allah did not make any statement that would have seduced Adam. He simply banned the tree, that's all. He gave no reason.
This is not Bible Criticism here right now, because the Bible also expresses the same, a bit differently.

Now let us turn from Eden to the rest of the Quran, where the tree is a symbol of good and bad, of blissful and evil:

Seest thou not how Allah sets forth a parable? - A goodly word like a goodly tree, whose root is firmly fixed, and its branches (reach) to the heavens,- of its Lord. So Allah sets forth parables for men, in order that they may receive admonition. (Quran 14:24)

"Goodly word" is usually interpreted as the Divine Word, the Divine Message, the True Religion. It may also be interpreted in a more general sense as a word of truth, a word of goodness or kindness, which follows from a true appreciation of Religion. For Religion includes our duty to Allah and our duty to man. The "evil word" is opposite to this: false religion, blasphemy, false speech, or preaching or teaching unkindness and wrong-doing.

And the parable of an evil Word is that of an evil tree: It is torn up by the root from the surface of the earth: it has no stability. (Quran 14:26)

Is that the better entertainment or the Tree of Zaqqum? (Quran 37:62)

Also, in 17:60. This bitter tree of Hell is in contrast with the beautiful Garden of heaven with its delicious fruits.

Why am I talking so much about these trees in Eden and outside Eden? Because these symbols also show the proximity of thought between the religions of Monotheism. The symbols are the same. There is a difference between doctrines, but there is no difference in the display of values. Then why did so many people die in vain because of simple dots on words? And the one who lives for manufacturing or discovering such dots, why is he among us? Trees are more intelligent creatures. Let's hug them.