OCR A Level Biology:復習筆記2.6.11 The Use of Stem Cells
Stem Cells in Research & Medicine Use of embryonic stem cells Due to their ability to differentiate into multiple cell types, stem cells have huge potential in the therapeutic treatment of dise...
OCR A Level Biology:復習筆記2.6.10 Stem Cells in Animals & Plants
Stem Cells in the Bone Marrow The stem cells found in bone marrow are?multipotent adult stem cells This means they can?only?differentiate into erythrocytes (red blood cells), monocytes, neutrophils...
OCR A Level Biology:復習筆記2.6.9 Stem Cells
Features of Stem Cells A?stem cell?is a cell that can?divide?(by mitosis) an?unlimited number of times Each new cell (produced when a stem cell divides) has the potential to?remain a stem cell?or t...
OCR A Level Biology:復習筆記2.6.8 The Organisation of Cells
The Organisation of Cells As seen on the last page, in complex?multicellular?organisms?eukaryotic?cells become?specialised?for?specific functions. For example: Epithelial cells in the small intesti...
OCR A Level Biology:復習筆記2.6.7 Specialised Cells
Specialised Cells In complex?multicellular?organisms,?eukaryotic?cells become?specialised?for?specific functions These specialised eukaryotic cells have?specific adaptations?to help them carry out ...
OCR A Level Biology:復習筆記2.6.6 The Significance of Meiosis
Significance of Meiosis Having?genetically different offspring?can be?advantageous?for natural selection Meiosis?has several mechanisms that?increase the genetic diversity of gametes?produced Both ...
OCR A Level Biology:復習筆記2.6.5 The Stages of Meiosis
Stages of Meiosis Meiosis is a form of?nuclear division?that results in the?production of?haploid?cells?from diploid cells It produces?gametes?in plants and animals that are used in?sexual reproduc...
OCR A Level Biology:復習筆記2.6.4 The Significance of Mitosis
Significance of Mitosis Mitosis is the process of nuclear division by which two genetically identical daughter nuclei are produced that are also genetically identical to the parent nucleus The proc...
OCR A Level Biology:復習筆記2.6.3 Identifying Mitosis in Plant Cells
Identifying Mitosis in Plant Cells Growth in plants occurs in specific regions called?meristems The root tip meristem can be used to study?mitosis The root tip meristem can be found?just behind the...
