In some species of cyanobacteria, there are some specialized cells known as heterocytes. They occur in intercalary, basal and terminal sites.... View Article
The enzyme nitrogenase is a Mo-Fe protein. They catalyze the conversion of atmospheric nitrogen to ammonia which is the first stable product of... View Article
Different cells take varying lengths of time to finish the cell cycle. A normal human cell can take close to 24 hours for division, however, the... View Article
The fate of daughter cells produced in a round of cell cycle depends on what type of cell they actually are. Two possible events can occur -... View Article
Compared to animal cells, plant cells are much stiffer. It is wrapped by a rigid cell wall that has high internal pressure. As a result, plant... View Article
Cell division in animals takes place when a cluster of cytoskeletal fibers known as the contractile ring contracts inwards, thus pitching the... View Article
Cells must undergo and complete vital events for division such as growth, copying genetic content, splitting into daughter cells. Cells carry out... View Article
Telophase is the last stage of mitosis. Some main events occurring during telophase are - Chromosomes expand into a tangle of chromatin... View Article
In the case of elements that are relatively immobile in plants such as S, Ca, the deficiency symptoms first appear in young tissues and leaves.... View Article
Oxygen evolves in the process of photosynthesis by photolysis of water occurring in membranes of grana thylakoids. Photocatalytic splitting of... View Article
There are several factors, both internal and external which work together to regulate cell division, they are as follows: External factors are... View Article
For the hair growth cycle, cell division is responsible. Here, new cells push forward the new cells for it to grow longer, hence new hair gets... View Article
The stages of the cell cycle in any cell with a nucleus or eukaryotic cells are grouped into two main phases - the mitotic phase and the... View Article
The process of meiosis produces genetic diversity in the following ways - Through the random orientation of paternal and maternal chromosomes... View Article
Interphase is the period between mitotic divisions - that is, G1, S and G2. It is during this phase that the cell grows, carrying out metabolic... View Article
A cell must undergo all its stages for complete development of the cell. If this does not happen, a mutated cell is an outcome. If the cell skips... View Article
Anaphase is considered a short phase. This phase involves the separation of sister chromatids and their separation. The spindle fibers contract... View Article
Symptoms of low prolactin levels include: Infertility Absence of periods / irregular periods Vaginal dryness Breast Milk discharge when not... View Article