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Cell culture is the complex process by which cells are grown under controlled conditions. The growth of explants taken directly form the living organism (e.g. biopsy material) is also known as primary cell culture. The culture consists of mixed population of cell types. Frequently the some of the cells may survive without proliferating and will therefore be lost in the increasing population of those which are able to multiply in the conditions supplied in vitro. Cells from explants may sometimes be converted to cell lines by passage. These may continue to proliferate for a number of cell generations. In some instances the primary cells are fused with so-called immortal (cancer) cells to produce a hybridoma line. Many of the explanted cells will only survive for one or a few passages before dying.
A primary cell is a non-rechargeable battery that cannot be reused once it has been depleted. In contrast, a secondary cell is a rechargeable battery that can be reused multiple times by recharging it when it runs out of power.
Cells and batteries are categorised as being 'primary' or 'secondary'. A 'primary cell' is non-rechargeable -in other words, it is a disposable cell. A 'secondary cell' is a rechargeable cell.
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Define directional vs non directional hypothesis?
A directional hypothesis predicts the direction of a relationship or difference between variables, stating which variable will have a greater or lesser effect. A non-directional hypothesis simply predicts that a relationship or difference exists between variables without specifying the direction.
Define meristems and explain its role in primary and secondary stem growth?
Meristems are regions of undifferentiated cells in plants that have the ability to divide and differentiate into various types of specialized cells. In primary stem growth, apical meristems located at the tips of stems are responsible for vertical growth. In secondary stem growth, lateral meristems such as vascular cambium and cork cambium are responsible for increasing stem girth through the production of secondary xylem and phloem, and cork, respectively.
What is the difference between a simple and long chain polymer?
The main difference between a simple and long-chain polymer is the size of the repeating units they are made of. Simple polymers consist of small repeating units, while long-chain polymers are made up of longer repeating units. Long-chain polymers typically have higher molecular weights and physical properties than simple polymers.
Define the meaning of the term differences?
"Differences" refer to variations or distinctions between two or more things. These variations could pertain to characteristics, qualities, quantities, or aspects that set them apart from each other.
What is a primary niche?
A primary niche refers to the main focus or specialization of a business or individual within a particular market or industry. It helps to define the key area of expertise or product/service offerings that sets them apart from competitors and attracts their target audience.
Explain the difference between primary and secondary market research data give an example of each and explain how each helps define a business customer?
difference between primary and secondary market
Define the relationship between primary consumers and secondary consumers?
Between that of a Primate and a Scavanger
Define the difference between primary and secondary endocrine pathology?
Primary endocrine pathology refers to dysfunction within an endocrine gland itself, causing abnormal hormone production. Secondary endocrine pathology results from dysfunction in the pituitary gland or hypothalamus, leading to inadequate stimulation or suppression of hormone production in the target endocrine gland.
Compare primary and secondary succession by giving examples of each?
Compare means define so define both of the terms.
What is difference between define and cons Explain with suitable example?
Difference between define and cons is that, con is disadvantage, whereas define means to elaborate something fully.
How do you define difference between a 105 and is2062?
how to identify difference between A 105 and IS 2062
What is secondary key?
define secondary key
What are difference between primary and secondary data?
Primary data is data which has been collected by yourself, which is more reliable and up to date. Secondary data has been collected from a secondary source (Other people, business etc.) so it may not be valid or up to date."Primary" and "secondary" are terms used to define data relative to the purpose by which the data were collected originally."Primary data" are data collected for the need at hand."Secondary data" are data that were collected for another reason but is being re-purposed to address the need at hand.When describing the expertise of data analysts, it is not uncommon to distinguish between primary and secondary data analytics. Primary data analytics involves the ability to analyze data for the purpose by which it has been collected. Secondary data analytics involves identifying "secondary data sources" to solve a new problem and then the ability to re-purpose that data.Primary data is a data which is created for the first time and there is no previous source available. Secondary data is a readily available data like data from trade directories,statistics from websites etc. In Dissertation Literature review is done through secondary data which includes the contents such as theories, models, compilation, research findings by some other scholar etc.
Define secondary source?
A written paper or recording presenting information find at another source. It is part of a scholarship, along with a primary source.
Define secondary sector?
no.
What is no of turns in winding of secondry side of Trasformer when the input is 11KVA and output is 430V?
Turns ratio will define the change in voltage from primary to secondary. What you have supplied is not enough information - you have 1 voltage, and a power value (Killovoltamperes = KVA), which is clearly not enough to answer the equation: N1/N2 = V1/V2, where N1 is the primary side turns, N2 is the secondary, V1 is primary, and V2 is secondary voltage.
What key defines a relationship between two tables 1 Primary key 2 Secondary key 3 Foreign key?
Foreign key is used to define a relationship between two tables by referencing the primary key of another table. It ensures data integrity and enforces referential integrity between the related tables.
