Email:

Popular Searches

  • Apr 05 2007 0183 32 In the evolutionary story plants arrived relatively late in earth history The first fossils of plants are supposed to be 475 million years old Evolutionists generally agree that plants evolved from algae that slowly began to colonize the land This could not have occurred until after there was an intact ozone layer to protect the plants from...

  • Jun 18 2018 0183 32 Plant cells are eukaryotic cells or cells with a membrane-bound nucleus Unlike prokaryotic cells the DNA in a plant cell is housed within a nucleus that is enveloped by a membrane In addition to having a nucleus plant cells also contain other membrane-bound organelles tiny cellular structures that carry out specific functions necessary for normal cellular operation...

  • Plant cells are a type of eukaryotic cell that are found in organisms of the Plant Kingdom As an organism grows its cells become specialized to perform specific functions There are various types of plant cells which include parenchyma cells sclerenchyma cells collenchyma cells xylem cells and phloem cells...

  • Plant disease an impairment of the normal state of a plant that interrrupts or modifies its vital functions Plant diseases can be classified as infectious or noninfectious depending on the causative agent Learn more about the importance transmission diagnosis and control of plant diseas...

  • A difference between plant cells and animal cells is that most animal cells are round whereas most plant cells are rectangularPlant cells have a rigid cell wall that surrounds the cell membrane Animal cells do not have a cell wall When looking under a microscope the cell wall is an easy way to distinguish plant cells Chloroplasts...

  • Plant cell the basic unit of all plants Plant cells like animal cells are eukaryotic meaning they have a membrane-bound nucleus and organell Their characteristic cell wall is composed of cellulose and they contain chloroplasts for photosynthesis...

  • Plant virus any of a number of agents that can cause plant disease Plant viruses are of considerable economic importance because many of them infect crop and ornamental plants Numerous plant viruses are rodlike and can be extracted readily from plant tissue and crystallized The majority of them...

  • Jan 13 2020 0183 32 Discovery of the Cell Hooke is best known today for his identification of the cellular structure of plants When he looked at a sliver of cork through his microscope he noticed some pores or cells in it Hooke believed the cells had served as containers for the noble juices or fibrous threads of the once-living cork tree...

  • ADVERTISEMENTS In this article we will discuss the history principles and significance of the callus culture Brief Past History of Callus Culture R J Gautheret France 1934-1937 He first succeeded in promoting the development of callus tissue from excised cambial tissue of Salix capraea and other woody speci He was able to promote the growth...

  • The cell is the basic unit of life Plant cells unlike animal cells are surrounded by a thick rigid cell wall ATP is short for adenosine triphosphate it is a high-energy molecule used for energy storage by organisms In plant cells ATP is produced in the cristae of mitochondria and...

  • All cells have a plasma membrane cytoplasm and ribosom Eukaryotic cells like plants and animals also have membrane-bound nuclei and organelles eg mitochondria endoplasmic reticulum lysosomes At the magnifications that are generally attainable in...

  • May 04 2019 0183 32 Animal cells and plant cells are similar in that they are both eukaryotic cellsThese cells have a true nucleus which houses DNA and is separated from other cellular structures by a nuclear membrane Both of these cell types have similar processes for reproduction which include mitosis and meiosisAnimal and plant cells obtain the energy they need to grow and maintain normal cellular...

  • May 23 2019 0183 32 Scientists could readily tell that plants were completely made up of cells due to their cell wall However this was not so obvious for animal cells which lack a cell wall Many scientists believed that animals were made of globul German scientists Theodore Schwann and Mattias Schleiden studied cells of animals and plants respectively...

  • Like all organisms plants have cellsPlant cells have a nucleus with chromosomes and DNA and they have mitochondriaThose are common to all eukaryotic cells But in some ways they are different from animal cells and the cells of other eukaryot They have cell walls composed of cellulose and some other compounds Pectin and sometimes lignin is secreted on the outside of the cell membrane...

  • Genetic engineering is the science of manipulating genetic material of an organism The first artificial genetic modification accomplished using biotechnology was transgenesis the process of transferring genes from one organism to another was first accomplished by Herbert Boyer and Stanley Cohen in 1973 It was the result of a series of advancements in techniques that allowed the direct...

  • Oct 19 2020 0183 32 The cell wall is a tough layer found on the outside of the plant cell that gives it strength and also maintains high turgidity In plants the cell wall contains mainly cellulose along with other molecules like hemicellulose pectin and lignins The composition of the plant cell wall differentiates it from the cell walls of other organisms...

  • Along with these there are other essential cell organelles that contribute in the proper working of the cell If you happen to compare a plant cell with an animal cell it proves them to be closely similar except for the fact that the latter lacks a chloroplast and cell wall A plant cell generally ranges from 10 to 100 micrometers in size...

  • Plant tissue culture or the aseptic culture of cells tissues organs and their components under defined physical and chemical conditions in vitro is an important tool in both basic and applied studies as well as in commercial application It owes its origin to the ideas of the German scientist...

  • Viruses infect organisms as diverse as bacteria plants and animals They exist in a netherworld between a living organism and a nonliving entity Living things grow metabolize and reproduce Viruses replicate but to do so they are entirely dependent on their host cells They do not metabolize or grow but are assembled in their mature form...

  • Mar 04 2017 0183 32 Cellular totipotency in plants 1 plants RICHA KHATIWADA 1 2 Totipotency is the ability of a single cell to divide and produce all of the differentiated cells in an organism In other words totipotency is the genetic potential of a plant cell to produce the entire plant Isolated cells from differentiated tissue are general...

  • Aug 25 2020 0183 32 Plant Cell tpc006642019 First Published on September 04 2019 Arabidopsis ENDOMEMBRANE PROTEIN 12 contributes to the endoplasmic reticulum stress response by regulating K/HDEL receptor trafficking King Pong Leung Ming Luo...

  • How are plant cells and animal cells similar and different There is a great variety and plants and animals found on earth If you look at a plant cell and a...

  • Jun 22 2019 0183 32 Differences between Plant and Animal Cells Plants and Animals consist the major kingdoms of Domain EukaryaOn the one hand Kingdom Plantae is composed of multi-cellular although some are unicellular autotrophic organisms At present it is estimated that the total number of plants is 400 000 while of course a lot remains undiscovered On the other hand the members of the Kingdom...

  • Nov 05 2007 0183 32 The cell theory or cell doctrine states that all organisms are composed of similar units of organization called cells The concept was formally articulated in 1839 by Schleiden Schwann and has remained as the foundation of modern biology The idea predates other great paradigms of biology including Darwin s theory of evolution 1859 Mendel s laws of inheritance 1865 and the...

  • Plant physiology is a subdiscipline of botany concerned with the functioning of plants Closely related fields include plant morphology plant ecology phytochemistry cell biology genetics biophysics and molecular biologyFundamental processes of plant physiology include photosynthesis respiration plant nutrition tropisms nastic movements photoperiodism photomorphogenesis circadian...

  • May 02 2007 0183 32 To be free from the constraints of small size and constant moisture that the parenchymatic transport system inflicted plants needed a more efficient water transport system As plants grew upwards specialised water transport vascular tissues evolved first in the form of simple hydroids of the type found in the setae of moss sporophyt These simple elongated cells were dead...

  • the history of clock research in plants The first writings at least in the western canon to recognize diurnal rhythms come from the fourth century BC Androsthenes described the observation of daily leaf movements of the tamarind tree Tamarindus indicus that were observed on the island of Tylos now Bahrein in the Persian Gulf during the...

  • Other functions of chloroplasts include fighting off diseases as part of the cell s immune system storing energy for the cell and making amino acids for the cell Interesting Facts about Chloroplasts Simple cells like those found in algae may only have one or two chloroplasts More complex plant cells however may contain hundreds...

  • A chloroplast is a small organelles inside the cells of plants and algaeThey absorb light to make sugar in a process called photosynthesisThe sugar can be stored in the form of starchChloroplasts contain the molecule chlorophyll which absorbs sunlight for photosynthesisIn addition to chlorophyll a chloroplast uses carbon dioxide CO 2 and water H 2 O to form sugar and gives off oxygen...

  • Protoplast from ancient Greek πρωτόπλαστος prōtóplastos first-formed is a biological term coined by Hanstein in 1880 to refer to the entire cell excluding the cell wall Protoplasts can be generated by stripping the cell wall from plant bacterial or fungal cells by mechanical chemical or enzymatic means...

Get Solutions & Quotation

If you can not chat online or send an e-mail at the moment, you can fill out the following form, leaving your contact information, we will contact you as soon as possible to meet any of your requirements!