The way that the spines are joined together at the center of the cell varies and is one of the primary characteristics by which acanthareans are classified.

Agar or agar-agar is a gelatinous substance derived by boiling from a polysaccharide in red algae, where it accumulates in the cell walls of agarophyte and serves as the primary structural support for the algae's cell walls.

Aside from the genetic material of the cell, nucleic acids often play a role as second messengers, as well as forming the base molecule for adenosine triphosphate, the primary energy-carrier molecule found in all living organisms.

The apparent rigidity of primary plant tissues is enabled by cell walls, but not due to the walls ' stiffness.

The primary cell wall of most plant cells is semi-permeable and permits the passage of small molecules and small proteins, with size exclusion estimated to be 30-60 kDa.

Molecular structure of the primary cell wall in plants.

* The primary cell wall, generally a thin, flexible and extensible layer formed while the cell is growing.

* The secondary cell wall, a thick layer formed inside the primary cell wall after the cell is fully grown.

In the primary ( growing ) plant cell wall, the major carbohydrates are cellulose, hemicellulose and pectin.

The most common hemicellulose in the primary cell wall is xyloglucan.

The outer part of the primary cell wall of the plant epidermis is usually impregnated with cutin and wax, forming a permeability barrier known as the plant cuticle.

The middle lamella is laid down first, formed from the cell plate during cytokinesis, and the primary cell wall is then deposited inside the middle lamella.

However, the primary cell wall, can be defined as composed of cellulose microfibrils aligned at all angles.

In some plants and cell types, after a maximum size or point in development has been reached, a secondary wall is constructed between the plasma membrane and primary wall.

The primary functions of chromatin are: to package DNA into a smaller volume to fit in the cell, to strengthen the DNA to allow mitosis and meiosis and prevent DNA damage, and to control gene expression and DNA replication.

The bottom level of the Party was the " primary party organization " ( первичная партийная организация ) or " party cell " ( партийная ячейка ).

In 1836, John Daniell invented a primary cell in which hydrogen was eliminated in the generation of the electricity.

When the cell is being discharged, it behaves like a primary cell, with the anode as the negative and the cathode as the positive electrode.

Too many people think that the primary purpose of a higher education is to help you make a living ; ;

This is the primary function of the imagination operating in the absence of the original experiential stimulus by which the images were first appropriated.

Neither is primary experience understood according to the attitude of modern empiricism in which nothing is thought to be received other than signals of sensory qualities producing their responses in the appropriate sense organs.

The principal defender of this view of primary experience as `` causal efficacy '' is Alfred North Whitehead.

Speaking as a non-Jew I believe that its primary contribution is in the realm of future policy.

The natural and primary aesthetic attitude is to enjoy contemporary art, to despise and dislike the art of the recent past, and wholly to ignore everything else ''.

Here we may observe that at least one modern philosophy of history is built on the assumption that ideas are the primary objectives of the historian's research.

But competent observers believe he is making progress, particularly toward what Sen. Jackson lists as the primary need -- `` a clearer understanding of where our vital national interests lie and what we must do to promote them ''.

Its primary advantage is that it is a moral choice ; ;

A primary function is the operation of a Government Bid Center, which receives bids daily from the Federal Government's principal purchasing agencies.

If the Department of State is to take primary responsibility for foreign policy in Washington, it follows that the ambassador is expected to take charge overseas.

For this reason, the more uncertain skywave service was denominated `` secondary '' in our rules, as compared to the steadier, more reliable groundwave `` primary service '', and, for both skywave service and skywave interference, signal strength is expressed in terms of percentage of time a particular signal-intensity level is exceeded -- 50 percent of the time for skywave service, 10 percent of the time for skywave interference.

As mentioned, the primary allocation objective to be followed in the allocation of stations on clear channels is the provision of widespread service, free from destructive interference.

The result is a color picture of the specimen where the primary colors correspond to the three different ultraviolet wavelengths.

A primary ingredient in these fields is imagination, and Tri-State Pipeline Corporation deserves a very good mark.

The theorem which we prove is more general than what we have described, since it works with the primary decomposition of the minimal polynomial, whether or not the primes which enter are all of first degree.

If Af are the projections associated with the primary decomposition of T, then each Af is a polynomial in T, and accordingly if a linear operator U commutes with T then U commutes with each of the Af, i.e., each subspace Af is invariant under U.

In the primary decomposition theorem, it is not necessary that the vector space V be finite dimensional, nor is it necessary for parts ( A ) and ( B ) that P be the minimal polynomial for T.

Though there is obviously great need for continued experimentation with various types of short-term intervention to further efforts in developing an operational definition of prevention at the secondary -- or perhaps, in some instances, primary -- level, the place of short-term intervention has already been documented by a number of investigators in a wide variety of settings.

Probably the primary reason for special treatment of a net operating loss carryover is the unique opportunity it presents for tax avoidance.

There were 30, 995 students in primary school, 19, 211 in high school, 9, 429 in college and a further 340 in special schools.

Ten primary, one special education, a high school and a middle school (' junior high school ') are operated by the government, along with three private high schools.

This is typically done by specific instructions / operations through special database user interfaces and tools, and thus may be viewed as secondary functional requirements ( which are not less important than the primary ).

An evangelist – patriarch's primary responsibility was to provide special blessings to members of the church ; these blessings were considered one of the eight sacraments in the RLDS Church.

Kinemacolor ( 1908 – 1914 ), Technicolor processes 1 through 4 ( 1917 – 1954 ), and Cinecolor used one, two or three strips of monochrome film stock sensitized to certain primary colors or exposed behind color filters in special cameras.

In the primary logo, designed by sports cartoonist Ray Gatto, each part of the skyline has special meaning — at the left is a church spire, symbolic of Brooklyn, the borough of churches ; the second building from the left is the Williamsburg Savings Bank, the tallest building in Brooklyn ; next is the Woolworth Building ; after a general skyline view of midtown comes the Empire State Building ; at the far right is the United Nations Building.

Establishing the cause of psychosis requires clinical examination, and sometimes special investigations, to diagnose or exclude secondary causes of psychosis ; if these are excluded, a primary psychiatric diagnosis can be established.

Other primary aspects of Japanese science fiction TV are the superhero tokusatsu ( a term literally meaning special effects ) series, pioneered by programs such as Moonlight Mask and Planet Prince.

In a crossplane V8, balance is achieved at each cylinder pair, since the primary imbalance of a 90 ° pair is a special case that can be cancelled with a crankshaft counterweight.

The last kings may have borne the Etruscan title lucumo, while the regalia were traditionally considered of Etruscan origin: the golden crown, sceptre, the toga palmata ( a special robe ), the sella curulis ( curule chair ), and above all the primary symbol of state power: the fasces.

There are nine secondary level schools, 16 primary schools and two schools for special education.

No special hardware is required in order to achieve redundant host PC setup: in case the primary host PC fails, the secondary host PC may start polling network controllers.

TF Hammer consisted of AMF and special operators as the primary effort to assault the Shahi-Kot Valley.

This restriction was slightly relaxed just before the July 1964 election, when authorities were allowed to provide places “ where this would enable married women to return to teaching .” In 1965, the Labour government provided a further relaxation which allowed authorities to expand “ so long as they provided some extra places for teachers to whom priority was to be given .” Nevertheless, the number of children under five in maintained nursery, primary, and special schools increased only slightly, from 222, 000 in 1965 to 239, 000 in 1969.

Aide Greg Schneiders suggested an unusual strategy, similar to Glenn's personal campaign and voting style, in which he would avoid appealing to narrow special interest groups and instead seek to win support from ordinary Democratic primary voters, the " constituency of the whole ".

Gulf Oil was the primary sponsor for NBC News special events coverage in the 1960s, notably for coverage of the U. S. space program.

* As the provinces were the result of consecutive conquests ( the homeland had a special status, exempt from provincial tribute ), both primary and sub-satrapies were often defined by former states and / or ethno-religious identity.

On December 27, 1979, 700 Soviet troops dressed in Afghan uniforms, including KGB and GRU special force officers from the Alpha Group and Zenith Group, occupied major governmental, military and media buildings in Kabul, including their primary target – the Tajbeg Presidential Palace.

The borough currently maintains 47 primary schools, 10 secondary schools, three special schools and five Pupil Referral Units.

The London Borough of Barnet has 86 primary schools, 22 secondary schools and four special schools.

There are four primary schools, three secondary schools, a regional college and a special needs school in Limavady.

The school district, Bethalto Unit School District 8 ( BCUSD8 ), is made up of two intermediate schools, two primary schools, one middle school, one high school, a special needs school, an administration building, and an industrial complex.

The primary basis for the township ’ s planning, zoning and land use decisions for at least the last 20 years has been the protection and preservation of their abundant and very special natural resources.