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Explain about the terms - bursae and captacula?
Paired water-filled sac located at base of each arm of a brittle star. Cilia in bursae circulate water. Its surface is significant in gas in gas exchange. Gametes may also be released into the bursa.Specialized ciliated tentacles that scaphopod molluscs use for feeding. Food is trapped on sticky bulb at the tip of captaculum before being moved to mouth by cilia on the captacula.
DB is a standard abbreviation used for the quantitative expression of: 1. the density of bacteria in a medium 2. a particular pollutant 3. the dominant Bacillus in a cultu
Nutrition of Embryo Sac The morphology of the ovule suggests that the chalazal end is the main route for the entry of nutrients. The funicular vascular supply ends at the bas
EXTINCTIO N - It refers to disappearance of a species from earth when its last surviving member dies. Organic evolution not only creats new sps. but also eliminates some ol
Leptontene: The chromosomes becomes visible, shorten and thick. The size of the nucleus increase. The homologous chromosomes start getting closer to each other. Z
DNA (deoxyribonucleic acid) is the molecule which are responsible for storing and transmitting the genetic information. DNA is a double- stranded molecule which is held together b
Illustrate oil-bearing materials Oil contents for vegetable oil-bearing materials vary between 18% and 68% of the total weight of the seed, nut, kernel or fruit as indicated i
What is the difference between embryo and endosperm?
Give three examples of reflex actions. Examples of reflex actions are alter in size of the pupil of the eye in response to light intensity, blinking in response to foreign par
Explain Absorption and Metabolism of Minerals? All minerals in the diet are not equally absorbed. Also different compounds and complexes of same mineral are absorbed with diffe
A fruit fly has four pairs of chromosomes in its cells. At meiosis, how many dissimilar combinations of maternal and paternal chromosomes are possible in the gametes? In gamet
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