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Q. How is the gymnosperm seeds formed? What are the ploidies of the structures that compose the seeds?
Their seeds are produced from differentiation of the megasporangia in the female strobiles (cones). Subsequent to an oosphere is fecundated the female gametophyte originates the haploid (n) primary endosperm (nutritive tissue that covers the embryo) and the covering of the megasporangium turns into the diploid (2n) seed shell.
Seminal plasma in human males is rich in : 1. fructose and calcium 2. glucose and calcium 3. DNA and testosterone 4. ribose and potassium Fructose and Calcium
Q. Causes of reduced Serum HDL levels? Possible causes of reduced Serum HDL levels: - Cigarette smoking - Hypertriglyceridemia - Obesity - Genetic factors - Lack
Functions of Testis The testis performs the following two functions: Proliferation of spermatozoa and Secretion of steroid hormones
The biological conversion of atmospheric nitrogen into ammonia in the group of plants known as legumes (peas, beans lentils and clover etc.) is achieved by the action of soil bacte
Duck plague (duck virus enteritis) Duck plague is the most serious disease caused by a herpes virus (Anatid herpes virus). Though antigenically homogenous, differences in virul
Halophytes are plants that live in moist soils with high salt concentrations. Despite being surrounded my water, halophytes are often referred to as "salty desert" plants. Explain
Urea molasses mineral block (UMMB) licks Development of urea molasses mineral block licks is another technology being increasingly used in several parts of India and such lick
Explain the life cycle of Nitrogen ? Nitrogen cycle: Along with carbon, hydrogen, and oxygen, nitrogen is one of the most common elements that form biological molecules. Nitr
What is determined by tube feet? Hollow and fluid-filled tubes which are part of the water vascular system in Echinoderms. Muscles associated with tube feet allow them to be hy
Q. What is the economic importance of sponges? a few chemical substances secreted by sponges have anti-inflammatory, anti-tumoral activities and antibiotic and they are used in
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