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Female Gametophyte
The nucleus of the megaspore undergoes three successive mitotic divisions forming eight nuclei. The megaspore enlarges into an oval shaped structure called the embryo sac . The eight nuclei of the embryo sac arrange themselves in 3 groups. (A I), (A - D), stages in the development of an o..
The nucleus of the megaspore undergoes three successive mitotic divisions forming eight nuclei. The megaspore enlarges into an oval shaped structure called the embryo sac . The eight nuclei of the embryo sac arrange themselves in 3 groups. (A I), (A - D), stages in the development of an o..The protein requirement (in mg) for males and females of different age..
The protein requirement (in mg) for males and females of different age groups is represented in the bar graph. At what age is the protein requirement of females greater than that of males? => 15-18 years or 19-24 years or 51+ years or 11-14 years..
The Recommended Daily Allowance of iron for both males and females in ..
The Recommended Daily Allowance of iron for both males and females in different age groups is shown in the bar graph. How much more iron is required by females than males in the age group 30-35 years? => 4 mg or 5 mg or 2 mg or 3 mg..
The Protein Requirement for males and females of different age groups ..
The Protein Requirement for males and females of different age groups is tabulated. Choose the appropriate bar graph of the data. Age Group For Males (in mg) For Females (in mg) 11-14 45 46 15-18 59 44 19-24 58 46 25-50 63 50 51+ 63 50 => Graph 1 or Graph 2 o..
Summary
Animals may reproduce by asexual and sexual modes. The reproductive system of sexually reproducing animals consists of primary sex organs which produce the gametes, the secondary sex organs which participate in reproduction but do not form gametes and accessory sex characters which distinguish the ..
Leadership
It is a cooperative intraspecific interaction in which the individuals of a group follow a specific member called leader when on move. Though there is interdependence between the leader and the group, there is no special benefit to the leader. The leader keeps the members of the..
It is a cooperative intraspecific interaction in which the individuals of a group follow a specific member called leader when on move. Though there is interdependence between the leader and the group, there is no special benefit to the leader. The leader keeps the members of the..Biotic Potential
. At a global level, biotic potential of females (for age group of 14 to 50 years) is 12 per every female..
Characteristics of Population
Individuals living in the same area are referred as local populations. They all experience similar ecological processess at a particular stage of the life cycle. Similar populations of a species occupying different geographical areas are called sister populations. Population is a dynamic ..
Histology
Each ovary is covered by a layer of germinal epithelium. During embryonic life, the cells of the germinal epithelium proliferate thousands of primordial follicles. The stroma is composed of fibrous connective tissue which is differentiated into outer cortex and inner medulla. The cortex contains th..
Characteristics of a Territory
a) Size of home range varies. It is can be as small as only a few metres (as in forest mouse) to several thousand square kilometres (as in African hunting dogs). b) Exhibiting territoriality may be a seasonal phenomenon for mating, after which the pair joins the wide area (home range). c) The terr..
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