Essays Tagged: "Plant cell"

Biology experiment on osmosis for gcse very good got an A* as course work so do not miss out

s turgid and hard as water enters the cell or it becomes dehydrated (this is called plasmolysing in plant cells) as water leaves the cell and the solution enters. There is a change of mass, volume, te ... reach an isotonic equilibrium. The potato cells become turgid and hydrated. However the potato is a plant therefore it has a cell wall that means that at some point the cell wall will stop letting in ...

(15 pages) 314 2 4.2 Mar/2002

Subjects: Science Essays > Biology > Plant Biology

Plan cells.

The Plant Cell Cell Wall Size: Around 1µ Basic Function: * Hold the shape of the cell. * Strengthe ... ic Function: * Hold the shape of the cell. * Strengthen the cell. Covering the cell membrane of the plant cell, there is the cell wall. The cell wall is composed of two layers of rigid, hard cellulose ... * Hold water and many nutrients Inside the cell, surrounded by the cytoplasm, is the vacuole. In a plant, the vacuole acts as an extremely large storage area, and serves as a "control" for the turgor ...

(3 pages) 82 1 3.8 Mar/2003

Subjects: Science Essays > Microbiology

Explain why the concentration of water in cells should be maintained within a narrow range for optimal function.

water molecules move from external watery environment to the cell. This is known as endosmosis.If a plant cell has lower water potential than the narrow range, water molecules move towards the cell un ... e cell starts to shrink due to water in cell moves out side the cell. This is known as exosmosis.In Plant cell the cytoplasm is attached with cell wall due to shrinkage the cytoplasm will shrink and d ...

(3 pages) 19 0 3.0 Oct/2005

Subjects: Science Essays > Biology

Cells.

Cells are the structure and function of all the animals' and plants' bodies. But animals and plants' cells are different, their structures are not all the same, ... ne or more cells. Every organelle looks different from others and they all have their own functions.Plant cells have different size and shapes but they all have the same parts. Plant cells and animal ... erent size and shapes but they all have the same parts. Plant cells and animal cells are different, plant cells have different structures that the animal cells don't. Plant cells have nucleus, chromos ...

(2 pages) 80 4 3.5 Oct/2005

Subjects: Science Essays > Biology

Discuss the similarities and differences between prokaryote and eukaryote cells.

prokaryote is a bacterium (See Figure 1). The other class is the Eukaryotes which are the cells of plants and animals, and example is a palisade cell (See Figure 2). Both have similarities and differ ... ell wall, (however this is not present in animal cells) - this is made of Peptidoglycan (though the plant cell is made of cellulose microfibrils embedded in a layer of calcium pectate and hemicellulos ...

(3 pages) 57 0 3.7 Oct/2005

Subjects: Science Essays > Biology

Carrot Regeneration.

Tissue culture is used as a method for commercial and research applications through which a single plant cell can be modified and grown into a mature plant with either the same or different character ... the same or different characteristics. This is helpful in genetic engineering by mass production of plants that are disease-free, secondary plant products and mutants. For this procedure a portion of ...

(1 pages) 2812 0 3.0 Dec/2005

Subjects: Science Essays > Environmental Science

Cell walls revised.

Plant cells have a cell wall, large central vacuole, and plasmodesmata.Like other eukaryotes, plants ... e other eukaryotes, plants have a nucleus, plasma membrane, mitochondria, and other organelles, but plant cells differ from animal, fungal, and protist cells in a number of important ways. The most ob ... remaining flexible; flower petals, for instance, are flexible but will snap if folded too far.When plant cells divide, they must form a new cell wall between them, and this is accomplished by the for ...

(2 pages) 16 0 0.0 Dec/2005

Subjects: Science Essays > Biology

Year 12 Biology Coursework; Why does raw turnip taste sweeter than raw potato?

e making it a lot more easier to distinguish which has the highest concentration of dissolved sugar.Plant cells have a cell surface membrane. Outside this there is the cellulose cell wall. Inside a pl ... . Inside a plant cell there is a solution of solutes, many of which can be found in the vacuole. In plants water flows through the cell wall and cell surface membrane into the vacuole from the outside ...

(7 pages) 22 0 3.0 Mar/2006

Subjects: Science Essays > Biology

Lab

stems. Some species are able to survive in diverse environment such as fishes in salt water, Cactus plants in dry land and mammalian cells in aqueous surrounding because of the specialized underlying ... -forms. In order for us to appreciate these special adaptation, we first need to know how a typical plant or an animal cell organelle behaves in different water and solute concentrations. In this lab, ...

(2 pages) 3427 0 0.0 Nov/2001

Subjects: Science Essays > Biology

Comparison of prokaryotic and eukaryotic cells

Comparison of Plant and Animal Cells Introduction Eukaryotic cells are very complex; there are many organelles, ea ... ructural differences amongst the cells and their organelles. The two groups of eukaryotic cells are plant and animal cells.Nucleus The reason that plant and animal cells are not divided in to two diff ... " referring to the nucleus. This means the eukaryotic cells have "true" membrane-bound nuclei. Both plant and animal cells have a membrane-bound nucleus; hence, they are grouped as eukaryotic cells. T ...

(14 pages) 55 0 0.0 Feb/2008

Subjects: Science Essays > Biology

Testable Question Is it possible to observe diffusion across a

able membrane from a region of higher water concentration to a region of lower water concentration. Plant cells have a cell wall as well as a plasma membrane. The cell wall is a rigid structure that i ... ic pressure within the cell. With the loss of this osmotic pressure the supportive structure of the plant is lost and the plant becomes limp and shriveled. By adding particles such as Na and Cl, the o ...

(2 pages) 2172 0 0.0 Feb/2008

Subjects: Science Essays > Chemistry

OSMOSIS- WHAT IS IT AND HOW DOES IT OCCUR IN GENERAL

s complete when all of the water molecules have been evenly spread out and can take place either in plant cells or animal cells, so long as a partially permeable membrane is present. Osmosis can also ... bing is an artificial permeable membrane. So how does Osmosis take place? When you put an animal or plant cell into liquid containing water, one of three things can happen. In the 1st option, if the m ...

(2 pages) 16 0 5.0 Sep/2008

Subjects: Science Essays > Biology

This paper is about Lynn Marguolis and her discovery of endosymbiosis; the theory that mitochondrias and chloroplasts evolved from bacterias.

between cells. An animal cell would surround an aerobic bacteria cell to form mitochondria, while a plant cell would surround blue-green algae to form chloroplast. (Berkley). This theory explains why ... ast. (Berkley). This theory explains why animals cells are able to perform cellular respiration and plant cells are able to perform photosynthesis. Aerobic bacteria cells and blue-green algae cells ar ...

(1 pages) 14 0 0.0 Dec/2008

Subjects: Science Essays > Biology

biodiversity

Biodiversity and natural resources Chapter 4.1 Plant StructureThe structure of a plant cell - I can compare the ultrastructure of plant cells with ... ructure of a plant cell - I can compare the ultrastructure of plant cells with that of animal cells:Plant cells have different organelles from animal cells OrganelleDescriptionFunctionCell Wa ... from animal cells OrganelleDescriptionFunctionCell WallArigid structure that surrounds plant cells. It's made mainly of the carbohydrate celluloseSupports plant cells.Middle lamella ...

(4 pages) 0 0 0.0 Sep/2013

Subjects: Science Essays > Biology

My ambition

side the cells. Prokaryotic cells… such as bacteria whereas eukaryotic cells… such as plant cells and animal cells.Generally, the living component of a cell is called the protoplasm whic ... i-permeable membrane known as the plasma membrane. Animal cells do not have a regular shape whereas plant cells have a fixed shape due to the presence of cell walls. Cytoplasm contains organelles that ...

(4 pages) 0 0 0.0 Mar/2014

Subjects: Area & Country Studies Essays

Environmental Toxicology Paper

processes are absorption, distribution storage, biotransformation and elimination. There are unique cellular effects within the organism when they come in contact with the toxicant. Toxicodynamics is ... tomach (Al-hamad, 2012).Ingestion is the route of exposure most often used for toxic chemicals. The cell membrane diffuses chemicals in the non-ionized form, making the level of ionization important i ...

(5 pages) 4 0 0.0 Sep/2014

Subjects: Science Essays > Environmental Science