A-level Biology B Question paper Unit 1 - Core Principles
... The cells of the cortex do not carry out photosynthesis and cannot synthesise their own sugar. They have thin walls and large vacuoles. The vacuoles contain a solution with a very low (very negative) water potential. These cells support the stem, keeping it upright. (i) Using the information given a ...
... The cells of the cortex do not carry out photosynthesis and cannot synthesise their own sugar. They have thin walls and large vacuoles. The vacuoles contain a solution with a very low (very negative) water potential. These cells support the stem, keeping it upright. (i) Using the information given a ...
cell counting - Bio-Rad
... cell counter, thus allowing for increased sample sizes, and therefore, greater statistical power than available previously and greater reliability in assessing live hemocytes. We also showed that the TC10 automated cell counter is capable of distinguishing between counts in samples obtained from ins ...
... cell counter, thus allowing for increased sample sizes, and therefore, greater statistical power than available previously and greater reliability in assessing live hemocytes. We also showed that the TC10 automated cell counter is capable of distinguishing between counts in samples obtained from ins ...
Hurthle Cell Neoplasm of the Thyroid: Still a Dilemma?
... HCNs are composed of at least 75% Hurthle cells (1). They are classified as benign HCA or malignant HCC and distinguished according to the presence of thyroid vascular or capsular invasion or metastatic disease (11). HCNs have partial encapsulation and usually, they are solitary tumors. Necrosis and ...
... HCNs are composed of at least 75% Hurthle cells (1). They are classified as benign HCA or malignant HCC and distinguished according to the presence of thyroid vascular or capsular invasion or metastatic disease (11). HCNs have partial encapsulation and usually, they are solitary tumors. Necrosis and ...
Simple staining
... Simple staining involves the use of only 1 dye and is used primarily as a means to study the morphology and structure of organisms. Differential staining uses more than 2 dyes and is also used to differentiate the organisms into one of two groups. Simple staining – there are two methods: positive st ...
... Simple staining involves the use of only 1 dye and is used primarily as a means to study the morphology and structure of organisms. Differential staining uses more than 2 dyes and is also used to differentiate the organisms into one of two groups. Simple staining – there are two methods: positive st ...
galls on Prionitis lanceolata (Rhodophyta)
... formation has not been clearly established. This study provides evidence that a heat-sensitive bacterial-sized factor (between 10 and 0.45 pm), present in living gall tissue, can induce similar growths on previously uninfected hosts. Unfortunately no bacteria have yet been isolated which are capable ...
... formation has not been clearly established. This study provides evidence that a heat-sensitive bacterial-sized factor (between 10 and 0.45 pm), present in living gall tissue, can induce similar growths on previously uninfected hosts. Unfortunately no bacteria have yet been isolated which are capable ...
Regulatory factors of embryonic stem cells
... The case for FGF-like factors being the primary mesoderm-inducing agents in vivo is further strengthened by the finding that a Xenopus homologue of the mammalian basic F G F gene exists, and RNA transcripts hybridizing with this, gene have been found to be expressed in embryos at stages where mesode ...
... The case for FGF-like factors being the primary mesoderm-inducing agents in vivo is further strengthened by the finding that a Xenopus homologue of the mammalian basic F G F gene exists, and RNA transcripts hybridizing with this, gene have been found to be expressed in embryos at stages where mesode ...
Homework: Practice Exam
... and/or the notes. I will provide an accessory handout for the last essay question. You are certainly welcome to use outside sources, but are not required to do so. Unless otherwise stated, you are only required to provide as much detail as I provided in my notes. If I want you to go beyond that, I w ...
... and/or the notes. I will provide an accessory handout for the last essay question. You are certainly welcome to use outside sources, but are not required to do so. Unless otherwise stated, you are only required to provide as much detail as I provided in my notes. If I want you to go beyond that, I w ...
Biology I - Saint Joseph High School
... It is the union of science and technology that forms the scientific endeavor and that makes it so successful. Although each of these human enterprises has a character and history of its own, each is dependent on and reinforces the other. This first theme draws portraits of science and technology tha ...
... It is the union of science and technology that forms the scientific endeavor and that makes it so successful. Although each of these human enterprises has a character and history of its own, each is dependent on and reinforces the other. This first theme draws portraits of science and technology tha ...
Progesterone Cream - The Tuesday Minute
... our cells. It is the imbalance of estrogen to progesterone ratio that sets up the breast cancer or uterine cancer in the women. It is this imbalance of estrogens to progesterone in the male that contributes prostate problems. This imbalance can also be a factor in heart disease and autoimmune disord ...
... our cells. It is the imbalance of estrogen to progesterone ratio that sets up the breast cancer or uterine cancer in the women. It is this imbalance of estrogens to progesterone in the male that contributes prostate problems. This imbalance can also be a factor in heart disease and autoimmune disord ...
To return to the chapter summary click escape or close this document.
... To return to the chapter summary click escape or close this document. ...
... To return to the chapter summary click escape or close this document. ...
Mitosis What is (and is not) mitosis?
... Chromatids arrive at opposite poles of cell, and new membranes form around the daughter nuclei. The chromosomes disperse and are no longer visible under the light microscope. The spindle fibers disperse, and cytokinesis or the partitioning of the cell may also begin during this stage. Cytokinesis In ...
... Chromatids arrive at opposite poles of cell, and new membranes form around the daughter nuclei. The chromosomes disperse and are no longer visible under the light microscope. The spindle fibers disperse, and cytokinesis or the partitioning of the cell may also begin during this stage. Cytokinesis In ...
Honors Biology
... Available Equipment and Materials, Storage Location: Microscopes in room 409 and 813A Misc. Materials located in biology rooms 813, 815, 409 Expendable material that must be teacher supplied or ordered Unit # 2: Ecology ...
... Available Equipment and Materials, Storage Location: Microscopes in room 409 and 813A Misc. Materials located in biology rooms 813, 815, 409 Expendable material that must be teacher supplied or ordered Unit # 2: Ecology ...
Gas Reference Cells Overview
... coalesced in a solid or liquid form on the cell walls. However, since the cell was sealed with vacuum conditions inside the cell, alkali vapor will be present. The atomic vapor will absorb light with wavelengths corresponding to the allowed transitions between the energy levels of the atoms. When th ...
... coalesced in a solid or liquid form on the cell walls. However, since the cell was sealed with vacuum conditions inside the cell, alkali vapor will be present. The atomic vapor will absorb light with wavelengths corresponding to the allowed transitions between the energy levels of the atoms. When th ...
Chapters 4 and 5 Cell Structures, Functions and Transport
... Nickname: “The Post Office” Function: packages and transports materials to different location inside/outside of the cell Appearance: stack of pancakes ...
... Nickname: “The Post Office” Function: packages and transports materials to different location inside/outside of the cell Appearance: stack of pancakes ...
Bacterial Growth - Belle Vernon Area School District
... oxygen but others are killed by it? Oxygen can be converted into a toxic form like (H2O2) & (O2-). Cells that do not die in the presence of oxygen produce enzymes ( ...
... oxygen but others are killed by it? Oxygen can be converted into a toxic form like (H2O2) & (O2-). Cells that do not die in the presence of oxygen produce enzymes ( ...
backward design template - reflectivepractitionerwiki
... Using agar cubes will visually model how a cell needs to be small in order to allow materials to diffuse in and out properly. The mathematically calculations will provide numerical ratios but seeing how a smaller cube will turn completely clear versus a larger cube with a bright pink center will vis ...
... Using agar cubes will visually model how a cell needs to be small in order to allow materials to diffuse in and out properly. The mathematically calculations will provide numerical ratios but seeing how a smaller cube will turn completely clear versus a larger cube with a bright pink center will vis ...
Transfection of Mouse and Human Embryonic Stem Cells - Bio-Rad
... and the delineation of gene function in animal models. The clinical applications of this technology may have a significant impact in regenerative medicine, since genetic modification of human ES cells is an important step toward stem cell–based therapies. Since pluripotent human ES cells have the un ...
... and the delineation of gene function in animal models. The clinical applications of this technology may have a significant impact in regenerative medicine, since genetic modification of human ES cells is an important step toward stem cell–based therapies. Since pluripotent human ES cells have the un ...
MIG3 bioceramic t-shirt for tendinitis of the shoulder – a case study
... synthesis and, consequently, stimulating the synthesis of proteins such as collagen and elastin. It also enhances cell division. In order to provoke this increase in metabolism, the extracellular medium is required to be healthy. Infrared stimulates chemical mediators and hormones that will act on t ...
... synthesis and, consequently, stimulating the synthesis of proteins such as collagen and elastin. It also enhances cell division. In order to provoke this increase in metabolism, the extracellular medium is required to be healthy. Infrared stimulates chemical mediators and hormones that will act on t ...
PDF
... thicker and showed isolated hypertrophic patches three to four cells thick. The cell types were similar to those found in the previous experiment, but a clear quantitative difference existed. Thus, while in expiants cultured on control medium for 3 days, only some of the sections contained isolated ...
... thicker and showed isolated hypertrophic patches three to four cells thick. The cell types were similar to those found in the previous experiment, but a clear quantitative difference existed. Thus, while in expiants cultured on control medium for 3 days, only some of the sections contained isolated ...
stem cell research
... what happens naturally during embryo development). Stem cells isolated from later stages of development (e.g. most foetal cell types, placental or adult stem cells) were thought to have a more limited plasticity, because they have already differentiated to some extent. But it is now thought that cel ...
... what happens naturally during embryo development). Stem cells isolated from later stages of development (e.g. most foetal cell types, placental or adult stem cells) were thought to have a more limited plasticity, because they have already differentiated to some extent. But it is now thought that cel ...
Q1.The effect of watering tomato plants with sodium chloride
... Scientists investigated the effect of a drug called a proton pump inhibitor. The drug is given as a tablet to people who produce too much acid in their stomach. It binds to a carrier protein in the surface membrane of cells lining the stomach. This carrier protein usually moves hydrogen ions into th ...
... Scientists investigated the effect of a drug called a proton pump inhibitor. The drug is given as a tablet to people who produce too much acid in their stomach. It binds to a carrier protein in the surface membrane of cells lining the stomach. This carrier protein usually moves hydrogen ions into th ...
Nucleic Acid Metabolism in Proliferating and
... metabolic regulatory controls that lead to the onset of DNA synthesis and its cessation during the differentiation of normal intestinal cells have not been well defined. In small intestinal cells of rodents, it has recently been shown that, as DNA synthesis stops, marked changes develop in the activ ...
... metabolic regulatory controls that lead to the onset of DNA synthesis and its cessation during the differentiation of normal intestinal cells have not been well defined. In small intestinal cells of rodents, it has recently been shown that, as DNA synthesis stops, marked changes develop in the activ ...
cell walls - SharpSchool
... solution in endodermis and parenchyma cells is discharged into cell walls (apoplast) by active and passive transport this allows the solution to then move to the xylem cells ...
... solution in endodermis and parenchyma cells is discharged into cell walls (apoplast) by active and passive transport this allows the solution to then move to the xylem cells ...
Analysing adaptations for respiration
... Respiration powerhouses Mitochondria are tiny sausage-shaped organelles found in most animal and plant cells. You can use a powerful microscope (such as an electron microscope) to see their complex structure. Each mitochondrion has two membranes. ...
... Respiration powerhouses Mitochondria are tiny sausage-shaped organelles found in most animal and plant cells. You can use a powerful microscope (such as an electron microscope) to see their complex structure. Each mitochondrion has two membranes. ...
Tissue engineering
Tissue engineering is the use of a combination of cells, engineering and materials methods, and suitable biochemical and physicochemical factors to improve or replace biological functions. While it was once categorized as a sub-field of biomaterials, having grown in scope and importance it can be considered as a field in its own right.While most definitions of tissue engineering cover a broad range of applications, in practice the term is closely associated with applications that repair or replace portions of or whole tissues (i.e., bone, cartilage, blood vessels, bladder, skin, muscle etc.). Often, the tissues involved require certain mechanical and structural properties for proper functioning. The term has also been applied to efforts to perform specific biochemical functions using cells within an artificially-created support system (e.g. an artificial pancreas, or a bio artificial liver). The term regenerative medicine is often used synonymously with tissue engineering, although those involved in regenerative medicine place more emphasis on the use of stem cells or progenitor cells to produce tissues.