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Fertilization - Development Biology
Previously you knew the process which leads to the differentiation of the male and female germ cells, the sperm and ova, respectively. In this section we shall describe the process by which the sperm and the egg unite to form a zygote. This process is known as fertilization. Fertilization results in
Activation would essentially mean that a sequence of metabolic and morphological changes are triggered that in turn cause the division of a unicellular zygote into a multicellular organism. Mostly we will describe the fertilization in mammals with occasional references to sea urchins. It is true that depending upon the habitat as well as the life styles there may be variations in the fertilization process in diverse organisms. But generally the events of fertilization are more or less similar in many different organisms. Prior to the actual fusion of the sperm and the egg nuclei, the germ cells prepare themselves for the fertilization process.
Morphological changes Aquatic plants produce different kinds of leaves and produce aerenchyma (tissues with air gaps) where there be a need to do so. Also, a thick cuticle on
TYPES E.R. consists of two types - 1. Rough E.R. 2. Smooth E.R. R o ugh E.R. S m o o th E.R.
Chromatin is made of DNA molecules associated to proteins known as histones.
Define the Basic Concepts behind the Spectral Techniques? Energy is transmitted via electromagnetic waves that are characterized by their frequency and wavelength. The physical
Q. What is continuous full thickness incision? 2. Continuous full - thickness incisions are indicated for a variety of situations outlined below. This type of incision may be u
Board spectrum antibiotics are effective against several diff. types of harmful bacteria ex: tetracycline
Q. Describe the pulmonary artery? The main pulmonary artery is seen on the PA view, as its left border forms the pulmonary bay. The right pulmonary artery runs horizontally to
Explain Avoidance of Shock in Nutritional Care? Loss of plasma proteins lead to decrease in blood volume (hypovolemia) and lowered red blood cell volume causing a potential dan
Explain The Peripheral Nervous System in detail? The peripheral nervous system is divided into the somatic nervous system and the autonomic nervous system. The somatic nervous
Explain Following Trems (a) State three structural features of prokaryotic cells. (b) Describe the functions in eukaryotic cells of lysosomes, ribosomes, and centrioles.
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