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kondaur [170]
3 years ago
9

What is Luca?Pls explain!​

Biology
2 answers:
stira [4]3 years ago
4 0

Answer:

<em>If you want to know what Luca is or stands for it stands for last universal common ancestor.</em>

Explanation:

<em>My explanation to this is that it is the most recent population of organisms from which all organisms now living on Earth have a common descent, the most recent common ancestor of all current life on Earth.</em>

<em></em>

Leto [7]3 years ago
3 0

Answer:

Last Universal Common Ancestor

The acronym LUCA stands for—Last Universal Common Ancestor. The term is used by astrobiologists and those interested in the evolutionary biology. The geological period of time in which LUCA existed was a point of demarcation from primitive life forms to more-advanced earth-living entities.

#google

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Water is a unique molecule which contains inter-molecular forces like vandar wall's forces and hydrogen bonding that results in extremely strong bonding forces among water molecules.

Cohesion and adhesion are the properties of water which refer to the fact that water molecules are not only very strongly attracted to water molecules but also to other polar molecules of any type.

This is the cohesive nature of the water which makes water a water drop and it is the adhesive nature of water due to which water takes the shape and available space in a glass or jar of water .

How these properties are a result of bonding between atoms?

Cohesive properties:

  • We are well aware of the fact that water is composed of one atom of oxygen and two atoms of Hydrogen.
  • The two hydrogen atoms align themselves in such a way that oxygen is in middle of them. Due to great electronegativity difference Oxygen gets a partial negative charge while Hydrogen atoms get partial positive charges.
  • Now one oxygen atom of one one water molecule attracts the partial positive charged hydrogen atom of another water molecule, and this attraction causes the bonding. This type of inter-molecular forces of atom gives water cohesive properties.

Adhesive properties:

  • If we talk about adhesive properties through which water is attracted to other materials of polar nature, these adhesive properties are also due to same nature of bonding.
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Hope it help!


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