Whole grains are an energy source with nutritional punch. To further satiate your interest go on to watch the other five parts, available on YouTube. You likely eat grains every day—cereal, a sandwich, pasta, or your favorite rice dish. Whole grains are vital to a healthful diet.
Chromosomes become shorter and more condensed in the process called supercoiling. The nuclear envelope begins to break down and disintegrate.
Microtubules that form the mitotic spindle begin to develop from the centrosomes in the cell. Centrosomes move towards the poles as the spindle grows and lengthens.
Metaphase The spindle fibers are attached to the centromeres of the chromosomes. Chromosomes move towards the equator of the cell and line up along the metaphase plate. The other ends of the microtubules of the spindle are attached to poles of the cell.
Anaphase The pairs of sister chromatids are pulled apart by the spindle fibers towards the poles. The chromatids are now considered chromosomes. The chromosomes move to the poles as a result of the shortening of the microtubule.
After anaphase the cell now has two genetically identical nuclei at each end of the cell. Telophase Nuclear membranes now begin to form around each set of chromosomes. Chromosomes begin to uncoil to form chromatin again.
The spindle fibers break down and nucleoli reform in each nucleus. The cell elongates and gets ready for cytokineis. Determination of a mitotic index from a micrograph. Cyclins are a family of proteins that help regulate the cell cycle They bind to enzymes called cyclin-dependent kinases, activating these cdk enzymes causing them to attach phosphates to other protein in the cell These proteins are also activated and carry out specific functions necessary to each phase of the cell cycle There are 4 main types of cyclin in human cells.
Tumors are the result of uncontrolled cell division, which can occur in any organ or tissue. These abnormal growths can either be localized primary tumoursmeaning they do not move to other part of your body. These tumours are benign.
If the cancer cells detach and move elsewhere into the body secondary tumoursthey are called malignant and are more life-threatening Diseases due to malignant tumours are known as cancer Metastasis is the movement from a primary tumour to set up secondary tumours in other parts of the body Cancer is usually caused by genetic abnormalities due to a variety of different sources called carcinogens or due to inheritance or errors in DNA replication.
Oncogenes are mutated forms of proto-oncogenes which typically control synthesis of proteins involved in cell signaling or cell division. These cells with activated oncogenes cause uncontrolled growth and cell division, prevent the cancer cell from dying and allow them to invade other tissues.
Tumor suppressor genes usually control replication and the cell cycle. In cancer cells these genes are generally inactivated causing a loss of normal function.The creative visual learning platform that every educator and student deserves.
The purple bacteria are one of the groups of photosynthetic bacteria (the other main groups being the cyanobacteria and green bacteria, though halobacterium can use light as .
The word bacteria is the plural of the New Latin bacterium, which is the latinisation of the Greek βακτήριον (bakterion), the diminutive of βακτηρία (bakteria), meaning "staff, cane", because the first ones to be discovered were rod-shaped..
Origin and early evolution. Arboriculture Glossary of Terms There are entries in this glossary. A. ABC (aerial bundle cable): system of reducing the physical hanging space of aboveground electrical conductors.
abiotic: nonliving. abiotic disorder: plant malady caused by nonliving, environmental, or man-made agents.
abscisic acid (ABA): plant hormone that stimulates stomatal closure and promotes seed and bud dormancy. RELATED INFORMATION. For an article that is a compliment to this article and a Must Read for those with Bettas, Discus, & other Amazon River SE Asia Fish, especially if RO Water is used in part or in full: Fish Osmoregulation.
Here is another article that compliments "Aquarium Chemistry". In contrast, The site of photosynthesis is chloroplast, while the sites of cellular respiration are cytoplasm and mitochondrion. The chloroplast, which has two membranes around a central aqueous space, is found mainly in mesophyll cells forming the tissues in the interior of the leaf.