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Minerals and Trace Elements
Oxygen, carbon, hydrogen and nitrogen are the most common elements that make up 96% of the total weight of a mammal. The next most abundant elements are calcium, phosphorus, potassium, sulphur, sodium, chlorine and magnesium. These make up nearly the remaining 4%.
Fifteen additional elements are required but their total combined amount in mammalian body is less than 0.01% of the body weight. Of the known 90 naturally occurring elements how many are essential for life? This is not known for many animals. In humans 26 elements are known to be necessary.
Membrane-bound organelles are absent in : 1. Saccharomyces 2. Streptococcus 3. Chlamydomonas 4. Plasmodium Streptococcus
CLE A V AG E - Holoblastic & unequal. First plane is meridional. 2 blastomeres are formed. 1 megamere & another micromere. 2nd plane is also meridional but at 90° to fir
Q. What are the phases into which photosynthesis is divided? Photosynthesis is divided into the photochemical phase or light reactions and the chemical stage.
Hormones secreted by gonads: 1. Testis and ovary are called gonads in the human body. 2. Apart from producing gametes, gonads also secrete hormones. Testis : Testis s
what is radula?
Sterility in Angiosperms Sterility in angiosperms may arise due to several causes. Either the anther may not be formed, or anthers are formed but meiosis may be abnormal. A
Which of the following processes in capillaries in the lung assist in the removal of carbon dioxide from the body? A. Net flux of bicarbonate from plasma into red blood cells.
define and explain Water vascular system with podia and tube-feet madreporite mostly present
Nutrition occurs in Protozoans All types of nutrition occur in Protozoa. Some protozoans synthesize their own food from inorganic precursors (carbon dioxide, nitrates or ammon
Glycosylation: The covalent addition of the sugar moities to N or O atoms present in the side chains of various amino acids of certain proteins, usually occuring within the Golgi
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