Cell Structure and Function

Microsporangia and Microsporogenesis Microsporogenesis is the meiotic division of microspore mother cells into microspores. The anther is the reproductive portion of the stamen. Two lobes link each anther. Two pollen chambers run longitudinally through each anther lobe. There are enough pollen microspores in the microsporangium to keep it going. Microsporangia’s Structure Microsporangia are made up […]

When the pituitary, an endocrine gland, produces excess growth hormone, a condition known as acromegaly develops. Although symptoms can emerge at any age, it is most commonly diagnosed in middle-aged individuals. The most common cause of acromegaly in most individuals is the presence of pituitary tumours. What are the symptoms of acromegaly? Well, there are

The Pituitary tumours that are the abnormal growths in the pituitary gland. Some pituitary tumours cause an overabundance of hormones that regulate vital bodily functions. Certain pituitary tumours can cause your pituitary gland to produce fewer hormones. The vast majority of pituitary tumours are noncancerous (benign) growths (adenomas). Adenomas are benign tumours that remain in

Mitosis is a stage of the cell cycle during which replicated chromosomes are split into two new nuclei. Mitosis is a type of cell division that produces genetically identical cells with the same number of chromosomes. Hence, equational division is also a name for the mitosis. Mitosis is preceded by the S phase of interphase

Meiosis is determined by two nuclear divisions rather than the single division seen in mitosis. These two nuclear divisions (meiosis I and meiosis II) have the same names as mitosis, with one exception. Prophase I, prometaphase I, metaphase I, anaphase I, and telophase I are the phases of meiosis I. Prophase II, prometaphase II, and

During cell division, spindle fibres are responsible for the formation of the mitotic and meiotic spindles. During nuclear division, they are generated by microtubules and play a key role in the process. When cells divide during mitotic and meiotic division, they are in charge of ensuring that sister chromatids are separated as well as the

Our immune system is the defensive system in a host, which consists of differently distributed tissues and organs. Lymphocytes are the essential cells of the immune system and are responsible for the adaptive immunity in an organism. The two lymphocytes are – B and T lymphocytes. And they originate from the lymphoid progenitors. They are

Cell division is followed by different stages of cell development. Cell division takes place at meristems, from which it goes through different stages of development. Differentiation is when cells acquire specific features to perform a particular function. Sequences Cell division, elongation and differentiation are the correct sequences in the development of a plant cell. The cell’s development refers

Cell division or cell cycle is the cell’s growth and duplication process. One parent cell splits and engenders two identical daughter cells in this process. Those upon maturing create some more offspring in a cyclical manner. Cell division plays a vital role in bodily growth or healing internal or external wounds. All prokaryotes and some

The leptotene stage, alternatively referred to as the leptonema, is the first of five substages of meiotic prophase I. The name leptonema is derived from the Greek for “thin threads.” After its chromosomes are duplicated during interphase, a cell destined to become a gamete enters the leptotene stage. During the leptotene stage, those duplicated chromosomes—each