September 25, 2012 at 8:24 pm Nikita Thanks a lot! It really helped me with my revisional Bio questions! October 3, 2012 at 7:18 am mukesh kaushik Very good ,i have taught my students .thanx October 4, 2012 at 10:58 pm kawneer THANK YOU IT HELPED ALOT !!!!!!! November 12, 2012 at 7:18 pm Justin thanks this helped a lot when i was tutoring.. Instead, use the methylene blue solution as the dye Observations When observing the onion skin cell, we noticed that the cells took on a brick-like structure and within the cells, small dots (the nuclei) can be seen
Plant and Animal Cell Structures
Created with CAST's UDL Book Builder Golgi Body The Golgi Body packages and transports proteins, and holds waste products until the cell is ready to get rid of them. This is a semi-permeable membrane, in that it allows some things in such as water and food molecules, but keeps out other things that may be harmful or unnecessary
PRICKLY PEAR CACTUSPrickly pear cacti (genus Opuntia, many species) are North American desert succulents that have flat, fleshy, leaf-shaped pads and large spines (modified leaves) growing from tubercles (small bumps on the pads). PLEISTOCENEThe Pleistocene was an epoch of geologic time that lasted from 1.8 million to 11,000 years ago; it was a period of widespread glaciation and large Ice Age animals (caled Pleistocene Megafauna)
The chemical that crosses the synaptic cleft and causes the transmission of the nerve message in an adjacent neuron or the stimulation of an effector cell (muscle or gland). nonvascular plants Plants lacking lignified vascular tissue (xylem), vascularized leaves, and having a free-living, photosynthetic gametophyte stage that dominates the life cycle
The smallest structural unit of an organism that is capable of independent functioning, consisting of one or more nuclei, cytoplasm, and various organelles, all surrounded by a semipermeable cell membrane. a device for converting chemical energy into electrical energy, usually consisting of a container with two electrodes immersed in an electrolyte See also primary cell, secondary cell, dry cell, wet cell, fuel cell 6
Plant cells are typically more rigid than animal cells; they do not move, and they are able to synthesize all the chemical compounds needed by the organism. The nucleolus contains the DNA for the plant or animal, and it serves as a set of instructions for building the various proteins that the organism needs
Their DNA is circular, as it is in the prokaryotes, and their ribosomes and reproductive methods (binary fission) are more like those of the prokaryotes. In higher plants, lamellae, internal membranes with stacks (each termed a granum) of closed hollow disks called thylakoids, are also usually dispersed throughout the stroma
Shared Organelles All cells, whether they are plant or animal, contain lysosomes, ribosomes, cytoplasm, a cell membrane, mitochondria, a Golgi apparatus and a nucleus with a nucleolus. What is known is that animal cells without centrioles tend to have more errors in division, while plant cells, which never have centrioles, do not seem to experience additional errors
The Nucleus
Speckles are often found close to actively transcribed genes and are thought to act as a reservoir for the splicing of nascent pre-mRNA at nearby genes. As an average mammalian cell can produce up to 10,000 ribosomes per minute, cells have to invest a very large portion of their own metabolic effort to meet demand from protein synthesis Dr
Mitochondrion Vacuoles Endoplasmic reticulum (ER) and Ribosomes This is a generalization, as some organelles are not found in all species or phyla of plants
Interactive Eukaryotic Cell Model
Smooth ER plays different functions depending on the specific cell type including lipid and steroid hormone synthesis, breakdown of lipid-soluble toxins in liver cells, and control of calcium release in muscle cell contraction. Smooth Endoplasmic Reticulum: Throughout the eukaryotic cell, especially those responsible for the production of hormones and other secretory products, is a vast network of membrane-bound vesicles and tubules called the endoplasmic reticulum, or ER for short
Plant and animal cells are both eukaryotic cells, so they have several features in common, such as the presence of a cell membrane, and cell organelles, like the nucleus, mitochondria and endoplasmic reticulum. Cellular respiration occurs in mitochondria on animal cells, which are structurally somewhat analogous to chloroplasts, and also perform the function of producing energy
The animal kingdom is unique among eukaryotic organisms because most animal tissues are bound together in an extracellular matrix by a triple helix of protein known as collagen. The process of cell fractionation enables the scientist to prepare specific components, the mitochondria for example, in large quantities for investigations of their composition and functions
Plant cells vs. Animal cells - Biology Online
A plant cell is bounded by a cell wall and the living portion of the cell is within the walls and is divided into two portions: the nucleus, or central control center; and the cytoplasm, a fluid in which membrane bound organelles are found. The proteins synthesized on ribosomes bound to granular endoplasmic reticulum are transferred from the lumen (open space inside endoplasmic reticulum) to the golgi apparatus for secretion outside the cell or distribution to other organelles
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