Meristematic tissues The term meristem has been derived from
... division. True meristem cells (eumeristems) have following important features. 1- They are normally isodiametric, spherical, oval or polygonal in shape. 2- They are compactly arranged and lack intercellular spaces. 3- They have thin, homogenous and cellulosic cell wall. Secondary wall is normally ab ...
... division. True meristem cells (eumeristems) have following important features. 1- They are normally isodiametric, spherical, oval or polygonal in shape. 2- They are compactly arranged and lack intercellular spaces. 3- They have thin, homogenous and cellulosic cell wall. Secondary wall is normally ab ...
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... (c) Attachment to the cytoskeleton and extracellular matrix (ECM) Elements of the cytoskeleton (cell’s internal supports) and the extracellular matrix (fibers and other substances outside the cell) may be anchored to membrane proteins, which help maintain cell shape and fix the location of certain ...
... (c) Attachment to the cytoskeleton and extracellular matrix (ECM) Elements of the cytoskeleton (cell’s internal supports) and the extracellular matrix (fibers and other substances outside the cell) may be anchored to membrane proteins, which help maintain cell shape and fix the location of certain ...
Cilia and Flagella
... There are 9 pairs of connected microtubules in a circle towards the outside edge of the cilia/flagella. These are called the outer microtubule doublets. The outer microtubules are connected to each other in a ring with cross-links (not pictured). The outer microtubules also connect to the center str ...
... There are 9 pairs of connected microtubules in a circle towards the outside edge of the cilia/flagella. These are called the outer microtubule doublets. The outer microtubules are connected to each other in a ring with cross-links (not pictured). The outer microtubules also connect to the center str ...
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... the chicken PSCA molecule that is significantly upregulated in the ciliary ganglion between E8 and E15. The chicken PSCA is neuronal specific molecule that belongs to the Ly-6/neurotoxin superfamily that includes abtx and lynx1 and compared to other tissues, it is highly expressed in the ciliary gan ...
... the chicken PSCA molecule that is significantly upregulated in the ciliary ganglion between E8 and E15. The chicken PSCA is neuronal specific molecule that belongs to the Ly-6/neurotoxin superfamily that includes abtx and lynx1 and compared to other tissues, it is highly expressed in the ciliary gan ...
A commentary on the G2/M transition of the plant cell cycle
... Francis — The G2/M transition of the plant cell cycle Based on a detailed analysis of CDKs at G2/M it might be that there are molecular circuits in plants which regulate the G2/M transition in the absence of the classic phosphoregulatory mechanisms exhibited by all other eukaryotes (Dissmeyer et al ...
... Francis — The G2/M transition of the plant cell cycle Based on a detailed analysis of CDKs at G2/M it might be that there are molecular circuits in plants which regulate the G2/M transition in the absence of the classic phosphoregulatory mechanisms exhibited by all other eukaryotes (Dissmeyer et al ...
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... pathways are activated in each tissue. ■ In shoots, auxin increases the flexibility of the cell wall to promote plant growth via cell elongation. ■ Auxin activates a proton pump in the plasma membrane which causes the secretion of H+ ions into the cell wall. ■ The result is a decrease in pH which ca ...
... pathways are activated in each tissue. ■ In shoots, auxin increases the flexibility of the cell wall to promote plant growth via cell elongation. ■ Auxin activates a proton pump in the plasma membrane which causes the secretion of H+ ions into the cell wall. ■ The result is a decrease in pH which ca ...
Regulation of neurogenesis by extracellular matrix and integrins
... – functional modulation of receptor tyrosine kinases. Integrin signalling and its close cooperation with growth factors-coupled pathway has been linked to the regulation of both survival and apoptosis in a variety of different cell types (Yamada and Even-Ram 2002), probably including also progenitor ...
... – functional modulation of receptor tyrosine kinases. Integrin signalling and its close cooperation with growth factors-coupled pathway has been linked to the regulation of both survival and apoptosis in a variety of different cell types (Yamada and Even-Ram 2002), probably including also progenitor ...
Article - Research | www.stowers.org
... We then examined clones mutant for profilin. As previously reported in the developing eye (Lee and Treisman, 2004), a clear loss of apical F-actin is observed in the corresponding mutant cells (Figures 3H–3K). However, we also noted that this was accompanied by an alteration of cell shape and a subs ...
... We then examined clones mutant for profilin. As previously reported in the developing eye (Lee and Treisman, 2004), a clear loss of apical F-actin is observed in the corresponding mutant cells (Figures 3H–3K). However, we also noted that this was accompanied by an alteration of cell shape and a subs ...
Gene Section MAPRE1 (Microtubule-associated protein, RP/EB family, member 1)
... EB1 is important in spindle positioning within the cell. This is thought to be due to its effects on astral microtubule dynamic instability. In budding yeast, EB1 also plays a role in positioning the mitotic spindle through the bud neck. In this case, it is through microtubule dynamics as well direc ...
... EB1 is important in spindle positioning within the cell. This is thought to be due to its effects on astral microtubule dynamic instability. In budding yeast, EB1 also plays a role in positioning the mitotic spindle through the bud neck. In this case, it is through microtubule dynamics as well direc ...
Understanding the role of cholesterol in cellular biomechanics and
... The association of actin with membrane regions enriched in cholesterol was known for a long time [47, 48,75,111]. However, one of the first demonstrations that rafts disruption by cholesterol sequestration could have an effect in actin organization came from a work from Kwik and co workers in 2003 [ ...
... The association of actin with membrane regions enriched in cholesterol was known for a long time [47, 48,75,111]. However, one of the first demonstrations that rafts disruption by cholesterol sequestration could have an effect in actin organization came from a work from Kwik and co workers in 2003 [ ...
organism - Cloudfront.net
... Characteristics of Life 5. Living things reproduce and develop. • All living organisms must reproduce to maintain a population. • The manner of reproduction varies among different organisms. • When organisms reproduce, they pass on copies of their genetic information (genes) to the ...
... Characteristics of Life 5. Living things reproduce and develop. • All living organisms must reproduce to maintain a population. • The manner of reproduction varies among different organisms. • When organisms reproduce, they pass on copies of their genetic information (genes) to the ...
PROTISTA
... also known as sleeping sickness, is parasitic disease. It is caused by protozoan parasites belonging to the genus Trypanosoma. They are transmitted to humans by tsetse fly (Glossina genus) bites which have acquired their infection from ...
... also known as sleeping sickness, is parasitic disease. It is caused by protozoan parasites belonging to the genus Trypanosoma. They are transmitted to humans by tsetse fly (Glossina genus) bites which have acquired their infection from ...
Collagen Type IV (H-234): sc
... The extensive collagen family is composed of several chain types, including fibril-forming interstitial collagens (types I, II, III and V) and basement membrane collagens (type IV), each type containing multiple isoforms. Collagens are fibrous, extracellular matrix proteins with high tensile strengt ...
... The extensive collagen family is composed of several chain types, including fibril-forming interstitial collagens (types I, II, III and V) and basement membrane collagens (type IV), each type containing multiple isoforms. Collagens are fibrous, extracellular matrix proteins with high tensile strengt ...
Lipid bylayers and Membranes
... • Typically include several types of lipids other than phospholipids. • A particularly important example in animal cells is cholesterol, which helps strengthen the bilayer and decrease its permeability ...
... • Typically include several types of lipids other than phospholipids. • A particularly important example in animal cells is cholesterol, which helps strengthen the bilayer and decrease its permeability ...
Translocation
... • Sugar loaded into phloem • increase in solute potential • leads to increase in water uptake from xylem • builds up hydrostatic pressure • unloaded at sink ...
... • Sugar loaded into phloem • increase in solute potential • leads to increase in water uptake from xylem • builds up hydrostatic pressure • unloaded at sink ...
5 Kingdoms and 6 Unifying Principles 5kingdomnotes.notebook
... Monera: Can live just about anywhere! -adjust internal production to external nutrient levels -can form cysts in bad times Protista: Must live in moist environment -adjust to moisture level -contractile vacuoles pump out water like this Fungi: found in almost any moist environment -spores can stay d ...
... Monera: Can live just about anywhere! -adjust internal production to external nutrient levels -can form cysts in bad times Protista: Must live in moist environment -adjust to moisture level -contractile vacuoles pump out water like this Fungi: found in almost any moist environment -spores can stay d ...
Gene Section DYRK1A (dual specificity tyrosine (Y)
... incidence of many cancer types is significantly reduced in people with Down syndrome (complete trisomy of chromosome 21), the results obtained in mice suggest that small differences in the amount of DYRK1A kinase could, through the calcineurin-dependent regulation of angiogenesis, modify the growth ...
... incidence of many cancer types is significantly reduced in people with Down syndrome (complete trisomy of chromosome 21), the results obtained in mice suggest that small differences in the amount of DYRK1A kinase could, through the calcineurin-dependent regulation of angiogenesis, modify the growth ...
Craig Thompson Commentary in Cell
... availability, which plays an essential role in human adaptation to a wide variety of physiologic and pathologic conditions. One thing we all learned in grade school is that oxygen is really important. Each time we breathe, oxygen is taken up through our lungs into the bloodstream and carbon dioxide ...
... availability, which plays an essential role in human adaptation to a wide variety of physiologic and pathologic conditions. One thing we all learned in grade school is that oxygen is really important. Each time we breathe, oxygen is taken up through our lungs into the bloodstream and carbon dioxide ...
The functions of cell wall polysaccharides in composition and
... Unbranched GAXs can hydrogen bond to cellulose or to each other. The attachment of arabinose and glucuronic acid side-groups to the xylan backbone of GAXs prevents the formation of hydrogen bonds, diminishing the extent of cross-linking between two unbranched GAX chains or GAX to cellulose. In gener ...
... Unbranched GAXs can hydrogen bond to cellulose or to each other. The attachment of arabinose and glucuronic acid side-groups to the xylan backbone of GAXs prevents the formation of hydrogen bonds, diminishing the extent of cross-linking between two unbranched GAX chains or GAX to cellulose. In gener ...
Mathematical model of the cell division cycle of fission yeast
... precisely, and the two copies of each DNA molecule „called sister chromatids… must be segregated accurately to the daughter cells „Fig. 1…. In eukaryotic cells, these two steps, called DNA replication and mitosis, occur during distinct temporal phases of the cell cycle „S phase and M phase… separate ...
... precisely, and the two copies of each DNA molecule „called sister chromatids… must be segregated accurately to the daughter cells „Fig. 1…. In eukaryotic cells, these two steps, called DNA replication and mitosis, occur during distinct temporal phases of the cell cycle „S phase and M phase… separate ...
Physical properties of the fluid should be noted, such as volume
... more basophilic and vacuolated, but cytoplasmic appearance is relatively unimportant in determining if cells are degenerate Lymphocytes: Normal lymphocytes appear much as they do in peripheral blood. Immature lymphoid cells (lymphoblasts) are characterized by their large size and the presence of a n ...
... more basophilic and vacuolated, but cytoplasmic appearance is relatively unimportant in determining if cells are degenerate Lymphocytes: Normal lymphocytes appear much as they do in peripheral blood. Immature lymphoid cells (lymphoblasts) are characterized by their large size and the presence of a n ...
Towards High-Throughput Flim for Protein
... provided by the SPC830 card. This ‘Single Button Press’ operation of many distinct and separate hardware components enables the full automation of this TCSPC FLIM microscope. The lower level modules are tied together by higher level functions, such as: multiple-point time lapse; region scanning and ...
... provided by the SPC830 card. This ‘Single Button Press’ operation of many distinct and separate hardware components enables the full automation of this TCSPC FLIM microscope. The lower level modules are tied together by higher level functions, such as: multiple-point time lapse; region scanning and ...
Answers ch00
... 2. all cells come from pre-existing cells 3. the cell is the smallest organisational unit of living things. A hypothesis is a possible explanation for an observed phenomenon. It is possible to derive predictions from good hypotheses and test them by experiments or specific observations. Hypotheses t ...
... 2. all cells come from pre-existing cells 3. the cell is the smallest organisational unit of living things. A hypothesis is a possible explanation for an observed phenomenon. It is possible to derive predictions from good hypotheses and test them by experiments or specific observations. Hypotheses t ...
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... daughter cells’ volumes, subsequent fates, and inheriCell divisions that are unequal in terms of the fates of tance of a domain of yolk-deficient cytoplasm called the two daughter cells are intrinsic to the development teloplasm. The inheritance of teloplasm has been correof most organisms. In some ...
... daughter cells’ volumes, subsequent fates, and inheriCell divisions that are unequal in terms of the fates of tance of a domain of yolk-deficient cytoplasm called the two daughter cells are intrinsic to the development teloplasm. The inheritance of teloplasm has been correof most organisms. In some ...
the Cytoskeleton in Plant Development1
... microtubules can change orientation in response to various stimuli (refer to section III for details). The ensuing mitosis is heralded by a displacement of the nucleus to the cell centre, i.e., to the site where the prospective cell plate will be formed. Simultaneously, radial microtubules emanate f ...
... microtubules can change orientation in response to various stimuli (refer to section III for details). The ensuing mitosis is heralded by a displacement of the nucleus to the cell centre, i.e., to the site where the prospective cell plate will be formed. Simultaneously, radial microtubules emanate f ...
Cytokinesis
Cytokinesis (cyto- + kinesis) is the process during cell division in which the cytoplasm of a single eukaryotic cell is divided to form two daughter cells. It usually initiates during the early stages of mitosis, and sometimes meiosis, splitting a mitotic cell in two, to ensure that chromosome number is maintained from one generation to the next. After cytokinesis two (daughter) cells will be formed that are exact copies of the (parent) original cell. After cytokinesis, each daughter cell is in the interphase portion of the cell cycle. In animal cells, one notable exception to the normal process of cytokinesis is oogenesis (the creation of an ovum in the ovarian follicle of the ovary), where the ovum takes almost all the cytoplasm and organelles, leaving very little for the resulting polar bodies, which then die. Another form of mitosis without cytokinesis occurs in the liver, yielding multinucleate cells. In plant cells, a dividing structure known as the cell plate forms within the centre of the cytoplasm and a new cell wall forms between the two daughter cells.Cytokinesis is distinguished from the prokaryotic process of binary fission.