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Q. Show the Embryological Evidence?
Embryology is the study of the successive stages of sporogencsis , gametogenesis and the growth and development of the embryo. The number of nuclei in the pollen grains at the time of pollen dispersal is either two or three. Double fertilisation is an example of embryological unity throughout the angiosperms. Based on the number of cotyledons, monocotyledons are separated from dicotyledons. The binucleate pollen is derived. Embryology has had systematic significance in the grass family, where with several other characters it has been used to revise the family's classification. In animals the embryological evidence is of great significance, e.g. the Anopheles maculipennis complex is broken into a number of sibling species on the basis of their egg structure. In Dacus oleae and ceratitis capitata.(fruit flies) the whole eggs are separated on the basis of the character of anterior pole and the whole classification of white flies is primarily based on the structure of their pupae.
What do you mean by Pelvic Girdle? Bones in vertebrates which connect the appendages on left and right side of the posterior appendicular skeleton to each other. Pelvic girdles
Double helical structure of dna
Minerals :- Magnesium Food Source Whole grains, nuts, legumes, green leafy vegetables Nutritional Functional role Essential nutrient: Deficiency is rare Co
T ertiary Structure (3 o S tructure) Highly folded protein. Globular in structure. Tertiary structure is stabilised by five types of bonds : (i ) P
Explain briefly how the stimulus at the finger produces an impulse in the sensory neurone using the following key words. 1. Energy conversion (linked to receptor) 2. Na+ in 3. Depo
Why should you not apply cosmetics while doing a lab experiment in class?
Q. Heavy Metals require for the normal finctioning of our body? Like the foods we consume, our bodies also contain many metallic elements. Most of these metals are actually r
explain excretory system of prawn?
ESR and CRP are elevated in almost all patients of arthritis and carditis and rarely in patients with chorea. ESR should be repeated periodically as it is useful in following the c
Define the Role of Vitamin D in the immune system? Immune responses that are, mediated by T-cells can be inhibited by tile large doses of calcitriol i.e. 1, 25 dihydroxycholec
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