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Why the biology have some branches?
Why the morphology deals with the study of form & structure?
DEfine nucleus?
Why the nucleus have two boundaries?
Define Ribosomes in detail?
Why the mitochondria called power energy?

Why the biology have some branches
Because 'biology' is a very, very broad subject- it means studying anything that is living. Dividing it up into separate branches allows it to be more specialized- that way, people interested in, say, fish could specifically be marine biologists, and not be burdened by all the other studies required to simply become a 'biologist.'

The term biology is taken from the Greek word "bios" meaning life and "logos" meaning study. Biology is the science that studies about various living organisms. A living organism could be a one-celled bacteria or a several-celled organism such as an animal or a plant. Biological science is classified into various branches, depending upon the organisms to be studied, and is a vast field.

How many branches the biology has?

Why the morphology deals with the study of form & structure?
Morphology is the study of the forms of living organisms, and with relationships between their structures.
Morphology is the study of how things are put together, like the make-up of animals and plants, or the branch of linguistics that studies the structure of words.
In morphology, the word part morph- means "form" and -ology means "the study of." So, those who study how something is made or formed are engaged in morphology. In biology, the morphology of fish might investigate how the gills work as part of the respiratory system. In language morphology, you might study how prefixes and suffixes added to a word change its meaning

There are different areas of morphology. Some of these areas include functional morphology, comparative morphology, and experimental morphology. In molecular morphology it describes the structure of compound molecules and polymers. There are two different branches of morphology which include eidonomy and anatomy. Many scientists enjoy the study of morphology because they enjoy the life sciences. Morphology is considered to be one of the life sciences.
DEfine nucleus
A central or essential part around which other parts are gathered or grouped; a core.

the nucleus of a city.

Something regarded as a basis for future development and growth; a kernel.

a few paintings that formed the nucleus of a great art collection.

A large, membrane-bound, usually spherical protoplasmic structure within a living cell, containing the cell's hereditary material and controlling its metabolism, growth, and reproduction.
nucleusUse Nucleus in a sentence nu·cle·us/ˈnukliəs, ˈnyu-/ Show Spelled [noo-klee-uhs, nyoo-] Show IPA
noun, plural nu·cle·i /ˈnukliˌaɪ, ˈnyu-/ Show Spelled [noo-klee-ahy, nyoo-] Show IPA , nu·cle·us·es.  
1. a central part about which other parts are grouped or gathered; core: A few faithful friends formed the nucleus of the club.  
2. Biology . a specialized, usually spherical mass of protoplasm encased in a double membrane, and found in most living eukaryotic cells, directing their growth, metabolism, and reproduction, and functioning in the transmission of genic characters. See illus. under ameba.
3. Physics.  the positively charged mass within an atom, composed of neutrons and protons, and possessing most of the mass but occupying only a small fraction of the volume of the atom.
4. Anatomy . a mass of nerve cells in the brain or spinal cord in which nerve fibers form connections.
5. Also called condensation nucleus.  Meteorology . a particle upon which condensation of water vapor occurs to form water drops or ice crystals.
The nucleus is a membrane bound structure that contains the cell's hereditary information and controls the cell's growth and reproduction.
Why the nucleus have two boundaries
Define Ribosomes;1.A minute round particle composed of RNA and protein that is found in the cytoplasm of living cells and serves as the site of assembly for polypeptides encoded by messenger RNA.

Why the mitochondria called power energy
Because it generates energy
the powerhouse of a cell is mitochondrion  which is the energy generator of cell. Each cell has multiple mitochondria

Energy is like air for cells and hence Mitochondria are known to be the sites which provide cellular respiration
The powerhouse of the cell is called the mitochondrion. It is responsible for producing energy that is used by the cells on its cellular activities. This cell structure is often abundant in active cells like the muscle cells because these cells require large amount of energy for its daily activities.
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