Paper-1 1. Non-chordata and Chordata: (a) Classification and relationship of various phyla up to subclasses: Acoelomate and Coelomate‚ Protostomes and Deuterostomes‚ Bilateria and Radiata; Status of Protista‚ Parazoa‚ Onychophora and Hemichordata; Symmetry. (b) Protozoa: Locomotion‚ nutrition‚ reproduction‚ sex; General features and life history of Paramaecium‚ Monocystis‚ Plasmodium and Leishmania. (c) Porifera: Skeleton‚ canal system and reproduction. (d) Cnidaria: Polymorphism‚ defensive
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internal view of anovary reveals many tiny saclike structures called ovarian follicles. Each follicle consists of animmature egg called an oocyte‚ surrounded by one or more layers of very different cells calledfollicle cells.The ovaries are for oogenesis-the production of eggs (female sex cells) and for hormone production (estrogen and progesterone). As the developing egg begins to ripen or mature‚ follicleenlarges and develops a fluid filled central region. When the egg is matured‚ it is called
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Know definitions of the words used for Meiosis‚ Mendel’s work and Genetics Dominant – expression that is always expressed when its gene recessive - An expression that is expressed only when its allele is the only form of the gene present in the genotype. incomplete dominance - Neither allele is dominant to the other‚ thus each is expressed in the heterozygous genotype producing an intermediate phenotype. EX. Red (RR) and White (R’R’) snapdragons produce pink (RR’). epistasis - A condition
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Puberty Puberty begins at age 8 to 10 for most girls in the United States. It is triggered by rising levels of GnRH‚ stimulates anterior lobe of pituitary to produce: FSH and LH. FSH stimulates developing ovarian follicles and they begin to secrete estrogen‚ progesterone‚ inhibin‚ and a small amount of androgen. Thelarche is the onset of breast development is the earliest noticeable sign of puberty. Pubarche is the appearance of pubic and axillary hair‚ sebaceous glands‚ and axillary glands. Menarche
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In “The Egg and the Sperm”‚ by Emily Martin‚ Martin it is explainsed how society’s predisposed views about gender can interfere with real scientific research. Additionally‚ she suggests (or some other verb--otherwise this isn’t a full sentence) how these views can lead to a perpetuation connection of cultural stereotypes about men and women and their respective reproductive cells. Implementing these human stereotypes on genderless cells “encourages people to imagine that what results is […] of deliberate
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Chapter 19 - Reproductive Systems Reproductive System: What is the function of the male and female reproduction systems? Produce and nurture sex cells (gametes)‚ and transport them to the site of fertilization. Male: The male sex organs are designed to transport sperm to eggs. Primary sex organs (gonads) produce sperm and hormones while accessory sex organs have a supportive function. The Testes: The testes are ovoid structures suspended in the skin-covered pouch called the scrotum. Each
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Nervous System and Sensory Organs • dorsal roots and ventral roots - connect Spinal nerves to the spinal cord • medulla -responsible for many involuntary functions such as heartbeat and breathing‚ primary communication pathway between the spinal cord and the rest of the brain‚ • cerebellum - receives input from multiple sensory receptor types and uses this information in coordination of complex body movements • pons- communication between lower and higher brain regions • midbrain- processes
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Aquatic Adaptation Aquatic plants - also called hydrophytic plants orhydrophytes - are plants that have adapted to living in aquatic environments. -One of the main problems facing submerged aquatic plants is their inability to obtain oxygen. Unlike terrestrial plants‚ these plants cannot obtain the vital gas through their stomata because they are submerged in water. -Therefore‚ the stems‚ roots‚ and leaves of submerged aquatic plants posses aerenchyma cells‚ which supply oxygen to the rest of
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spermatids. Spermatids differentiate and develop into sperm. Sperms are single celled male gametes with a head‚ midpiece‚ and a tail. Ovum (egg cell)‚ the female gamete is produced in the ovaries of female reproductive system. This process is known as oogenesis. In contrast to males‚ in females the initial steps in egg production occur prior to their birth. Diploid oogonia and primary oocytes produced in fetus and by the time she is born‚ females have about 1–2 million oocytes. In oocytes the first meiotic
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Part I: Biotechnology Bio – “life”; Techno – “tools”; ologoy – “the study of” The use of living systems and organisms to develop or make useful products Any technological application that uses biological systems‚ living organisms or derivatives thereof‚ to make or modify products or processes for specific use It is an interdisciplinary field merging basic sciences‚ applied science‚ and engineering Branches of Biotechnology a. Bioinformatics – an interdisciplinary field addresses biological problems
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