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Indicating the name and respective ploidy of each involved cell how can the formation of sperm cells from germ cells be described?
The formation of sperm cells, or spermatogenesis, begins with a germ cell called as spermatogonium (2n) that suffers mitosis and gives birth to the spermatocyte I (2n). The spermatocyte I undergoes meiosis I and produces two spermatocyte II (n) that then undergo meiosis II and make four spermatids (n). Each spermatid undergoes a maturation process known as spermiogenesis and four sperm cells appear.
Development of Endosperm In a fertilized embryo sac, the primary endosperm nucleus is generally observed below the zygote. It divides, and further divisions of its products gi
Neurological and Sensory System There are three neurological systems: sensory, motor and autonomic. Sensory system consists of sensory receptors, sensory nerve fibres. Differen
Define Reagents - Nelson Somogyi Method for Glucose Estimation? 1. Alkaline copper reagent Alkaline A- Buy commercial from SDS chemicals etc Alkaline B- Weigh 6.25 g anhy
Why does thermal inversion increases air pollution? What harm can thermal inversion cause to humans? Thermal inversion confines at low altitude a layer of pollutants that would
Archaeological Records of Human Campsites Archaeological records of human campsites indicate that early humans started out as small bands of hunters who supplemented kills wit
Define the role of riboflavin in Antioxidant Activity? Flavoproteins also have powerful antioxidant activity from their role as precursors to FMN and FAD. Among the FAD-requiri
REMOVAL OF TESTIS - It is male hypogonadism. (1 ) BEFORE PUBERTY - Cestration before puberty results in permanent sterility. This condition is eunuchoidism & shows the
Osmoregulation in Non-Chordate Metazoans Previously you have studied that in protozoans, particularly fresh water protozoans; contractile vacuoles play a significant role in t
Overcoming these difficulties is urgent. New instrumentation and measurement process, coupled with a developing computational infrastructure, give both a flood of data and the pro
Q. What is the difference between the exocrine gland and the endocrine gland? Endocrine gland is a gland whose secretions are called as hormones that are collected by the blood
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