Search found 45 matches

by leesajohnson
Wed Sep 21, 2016 6:14 am
Forum: Cell Biology
Topic: Stem Cells and Cell division?
Replies: 6
Views: 18215

Stem cells are the pluripotent cells of our bodies from which all other components develop (evolve). Stems are basically innocent cells. Stem cell therapies can be used as treatments for aging, vision loss, nerve damage and numerous other conditions that traditional medicine is unable to improve. C...
by leesajohnson
Wed Sep 21, 2016 5:49 am
Forum: Cell Biology
Topic: Liver Leukocytes
Replies: 3
Views: 3026

The liver has a unique dual blood supply with arterial blood delivered via the hepatic arteries and venous blood from the gut via the portal veins. This complex supply is necessary to allow nutrients from the gut to be transported to the liver, which is thus constantly exposed to gut-derived antigen...
by leesajohnson
Tue Sep 20, 2016 7:12 am
Forum: Botany Discussion
Topic: Herbarium
Replies: 1
Views: 9868

A herbarium is a house for preserving plants that are systematically categorized and displayed to be studied by botanists. http://www.ecoideaz.com/expert-corner/h ... odiversity
by leesajohnson
Tue Sep 20, 2016 6:20 am
Forum: Molecular Biology
Topic: Telomeres replication?
Replies: 2
Views: 2916

Telomeres are short repetitive sequences of DNA that cap the ends of chromosomes. Due to the end replication problem that the lagging strand of DNA is unable to copy the very tip of the chromosome, as well as susceptibility to oxidative stress, telomeres shorten with every cell division m Telomeres ...
by leesajohnson
Mon Sep 19, 2016 6:53 am
Forum: Cell Biology
Topic: Leukocytes in the Blood
Replies: 1
Views: 2439

Granulocytes (polymorphonuclear leukocytes) are leukocytes characterized by the presence of differently staining granules in their cytoplasm when viewed under light microscopy. There are three types of granulocytes: neutrophils, basophils, and eosinophils. Agranulocytes (mononuclear leucocytes) are ...
by leesajohnson
Mon Sep 19, 2016 6:37 am
Forum: Human Biology
Topic: Contagious Diseases Database.
Replies: 3
Views: 3887

There is no specific common adaptation that confers contagiousness; each (family of) pathogens is different. Also, in general contagiousness is not conferred by a single component but is rather the overall nature of the organism. Most importantly, the correct plural of "virus" is not "...
by leesajohnson
Sat Sep 17, 2016 8:56 am
Forum: Cell Biology
Topic: cell plate formation
Replies: 2
Views: 5665

The cell plate, which separates dividing plant cells in the course of mitosis and subsequently serves as a precursor of the cell wall, originates from Golgi vesicles. Such plates contain cell wall substances, possibly carbohydrates and uronides apt for polymerization, which constitute the amorphous ...
by leesajohnson
Sat Sep 17, 2016 8:30 am
Forum: Molecular Biology
Topic: When do mutations occur?
Replies: 24
Views: 74369

Mutations occur, quite simply, because it's impossible to achieve 100% accuracy during DNA replication and then not all of the mistakes are detected and then not all of those are correctly repaired. Other than that, physical damage as a result of oxidative damage and radiation is purely random. That...
by leesajohnson
Fri Sep 16, 2016 6:49 am
Forum: Evolution
Topic: Why are flowers "beautiful"?
Replies: 114
Views: 117245

A subjective response without factual basis, but I feel they very vividly represent the nature of love. Firstly, flowers are beautiful. They are vividly colored, beautifully scented, and come in innumerable varieties. However, they are delicate, easily tainted or ruined, and, even when carefully car...
by leesajohnson
Fri Sep 16, 2016 6:40 am
Forum: Zoology Discussion
Topic: What is this? Green Mosquito?
Replies: 3
Views: 12769

Green mosquitoes themselves are not dangerous or poisonous. However, they have been known to carry some infectious diseases that are dangerous to humans and animals. As I understand the said green is not termed as the mosquito. The wings are not as in mosquitoes and structure is entirely different. https://www.wired.com/2009/01/green-mosquitoe/
by leesajohnson
Thu Sep 15, 2016 7:04 am
Forum: Bioinformatics
Topic: Classification of non-coding RNA
Replies: 2
Views: 12311

Non-coding RNA (ncRNA) is just RNA that doesn't code for protein. Historically the "Central Dogma" defines a process of protein creation that goes from DNA --> RNA --> Protein in the cell. All ncRNA stops before being translated to protein.So non-coding RNA is usually split up into two cat...
by leesajohnson
Thu Sep 15, 2016 6:27 am
Forum: General Discussion
Topic: A palm or tree?
Replies: 2
Views: 2639

Palm trees are from a family of plants called Arecaceae. Most of them are trees but some are also shrubs. The date palm and the coconut palm are trees. Technically they are flowering plants (angiosperms). Angiospers are plants whose seeds are encapsulated in a fruit of some sort. https://simple.wikipedia.org/wiki/Palm_tree