Tag: zoology
Questions Related to zoology
Ritualized contests with little risk of serious injury or death to animal within the species lead to
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A stable dominance hierarchy
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Biological altruism
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Adaptive radiation
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Instinctive behavior
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A broader habitat
Ritual contests with little risk to injury help individuals to display their stereotyped aggression which in turn prevent other organisms to attack it. Organization of individuals of a grouped according to their dominance refers to as dominance hierarchy. The agonistic behaviour such as ritual contest with little risk leads to maintenance of stable hierarchy.
Which is social foresting species?
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Leucaena leucocephala
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Tectona grandis
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Mangifera indica
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Rosa indica
The social foresting species is:
Sacred groves are found in
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Meghalaya
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Punjab
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Jammu and Kashmir
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Bihar
A sacred grove is any grove of trees that are of special religious importance to a particular culture. These are also called sacred woods. They are examples of in-situ conservation of biodiversity. Such groves are found throughout the world. In our country, such groves are found in Meghalaya.
Oran is a
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Sacred grove
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Sacred landscape
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Sacred animal
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Endangered animal
Oran is a major coastal city located in the north-west of Algeria. It is an important city of Algeria due to its commercial, industrial, and cultural importance. It is a sacred landscape. A legend says that in 900 AD, lions still lived in the area. The last two lions were hunted on a mountain near Oran and are elsewhere referred to as "mountain lions".
Pituitary gland is under the control of
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Hypothalamus
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Adrenal gland
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Pineal gland
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Thyroid gland
While the pituitary gland is known as the 'master' endocrine gland, both of its lobes are under the control of the hypothalamus; the anterior pituitary receives its signals from the parvocellular neurons and the posterior pituitary receives its signals from magnocellular neurons.
The hormones that initiate ejection of milk, stimulates milk production and growth of ovarian follicles are respectively known as
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PRL, OT and LH
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PRL, ADH and FSH
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LH, PRL and FSH
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PRH, OT and LH
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PRH, OT and FSH
Prolactin-releasing hormone (PRH) activates the anterior pituitary to initiate production and ejection of breast milk through the production of prolactin. Oxytocin along with prolactin hormone stimulates milk production. FSH (follicle stimulating hormone) stimulates the growth of ovarian follicles in the ovary before ovulation.
Pheromones are secreted by
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Endocrine gland
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Exocrine gland
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Apocrine gland
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Mixed gland
In humans, pheromones are secreted onto our skin through the apocrine glands (sometimes called as human scent glands). These are similar to eccrine glands but the apocrine glands secrete a more oily substance. The apocrine glands are normally associated with hairy areas, such as armpits and the crotch area, and are also usually accompanied by eccrine glands, which help to disperse the pheromone secretions. Apocrine glands are activated at puberty, along with hair growth in the axillary (armpit) regions and crotch, which increase the surface area for pheromone dispersal.
Prostaglandins affect
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Blood pressure
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Defecation
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Osmoregulation
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Oxygen metabolism
Most prostaglandins act locally; they are powerful as locally acting vasodilators. Vasodilation occurs when the muscles in the walls of blood vessels relax, so that the vessels dilate. This creates less resistance to blood flow and allows blood flow to increase and hence blood pressure to decrease.
Thyrotropin - releasing factor (TRF) is produced by
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Cerebrum
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Optic lobe
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Cerebellum
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Hypothalamus
Thyrotropin-releasing hormone (TRH), also called as thyrotropin-releasing factor (TRF), is a tropic, tripeptidal hormone, produced by the hypothalamus, that stimulates the release of TSH (thyroid-stimulating hormone) and prolactin from the anterior pituitary.
GnRH of hypothalamus stimulates
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Ovulation and maintenance of corpus luteum
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Secretion of androgen and development of mammary gland
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Contraction of uterus during parturition
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Ejection of milk
GnRH of hypothalamus stimulates the synthesis and secretion of the two gonadotropin hormones, namely luteinizing hormone (LH) and follicle-stimulating hormone (FSH) from the anterior pituitary gland. FSH is responsible for the ovulation. It stimulates the growth of ovarian follicle and growth of eggs in the ovaries. It is also responsible for the pubertal development. Corpus luteum is formed and maintained by the LH.