Cockroach Morphology & Anatomy — Practice Questions

Free NEET Biology multiple-choice questions on Cockroach Morphology & Anatomy. Attempt each question and reveal the answer with a full explanation.

Which of the following is responsible for the formation of the 'Exine' layer in a pollen grain? Sporopollenin Pectin Cellulose Lignin Which of the following is a hormone-releasing Intra Uterine Device (IUD)? LNG-20 Multiload 375 Lippes loop Cu7 Cells of the tapetum, the innermost layer of the microsporangium, are characterized by: Having dense cytoplasm and being multinucleate Having thin cytoplasm and a single nucleus Being highly vacuolated and haploid Performing meiosis to produce microspores If for some reason, the vasa efferentia in the human reproductive system are blocked, the gametes will not be transported from: Testes to epididymis Epididymis to vas deferens Ovary to uterus Vagina to uterus For normal fertility in human males, at least percent of sperms must have normal shape and size, and at least percent of them must show vigorous motility. 60; 40 40; 60 50; 50 70; 30 Which of the following hormones is secreted by the ovary only in the later phase of pregnancy? Relaxin hCG hPL Progesterone The Medical Termination of Pregnancy (Amendment) Act, 2017, allows termination of pregnancy up to 24 weeks for certain categories of women, provided the opinion is taken from: Two registered medical practitioners One registered medical practitioner A government magistrate The family of the woman During oogenesis, the first meiotic division is completed within the tertiary follicle, resulting in the formation of: A large haploid secondary oocyte and a tiny first polar body Two equal-sized haploid secondary oocytes A diploid secondary oocyte and a haploid polar body Four haploid ootids During microsporogenesis, the first division of the pollen grain results in the formation of two unequal cells. Which of the following is true for the generative cell? It is small and floats in the cytoplasm of the vegetative cell It is larger and contains abundant food reserve It has a large irregularly shaped nucleus It is responsible for the formation of the pollen tube Identify the incorrect statement regarding the structure of a typical microsporangium. The endothecium helps in the nourishment of the developing pollen grains The tapetum is the innermost wall layer Cells of the tapetum generally have more than one nucleus The outer three wall layers provide protection and help in dehiscence Which of the following features is not present in Periplaneta americana ? Schizocoelom as body cavity Indeterminate and radial cleavage during embryonic development Exoskeleton composed of N-acetylglucosamine Metamerically segmented body Which of the following characteristics is incorrect with respect to cockroach? Hypopharynx lies within the cavity enclosed by the mouth parts In females, 7th-9th sterna together form a genital pouch 10th abdominal segment in both sexes, bears a pair of anal cerci A ring of gastric caeca is present at the junction of midgut and hind gut In a 7-celled, 8-nucleate embryo sac, the central cell contains: Two polar nuclei One diploid nucleus Three antipodal cells Two synergids In cockroach, excretion is brought about by- A. Phallic gland B. Urecose gland C. Nephrocytes D. Fat body E. Collaterial glands Choose the correct answer from the options given below : A and E only A, B and E only B, C and D only B and D only The secretory phase in the human menstrual cycle is also called: Luteal phase and lasts for about 13 days Follicular phase and lasts for about 6 days Luteal phase and lasts for about 6 days Follicular phase and lasts for about 13 days Which of the following is NOT a characteristic of wind-pollinated flowers? Brightly colored petals Light and non-sticky pollen Well-exposed stamens Large feathery stigma The male germ cells undergo meiotic divisions finally leading to sperm formation. These cells are: Spermatogonia Sertoli cells Leydig cells Interstitial cells Perisperm is: Persistent nucellus Residual endosperm Outer layer of seed coat Degenerated synergid Which of the following is the site of actual fertilization in humans? Ampullary-isthmic junction Uterus Cervix Infundibulum Apomixis is a form of asexual reproduction that mimics sexual reproduction by: Producing seeds without fertilization Producing seeds with fertilization Fragmentation Budding Which of the following is an example of an albuminous (endospermic) seed? Castor Pea Bean Groundnut During pregnancy, which hormone is secreted by the ovary and later by the placenta to help in the softening of pelvic ligaments? Relaxin hCG hPL Cortisol Identify the correct sequence of the three distinct phases of the human menstrual cycle based on the state of the endometrium. Menstrual phase Proliferative phase Secretory phase Secretory phase Menstrual phase Proliferative phase Proliferative phase Secretory phase Menstrual phase Menstrual phase Secretory phase Proliferative phase Sporopollenin, the most resistant organic material known, is absent in which part of the pollen grain? Germ pores Exine Intine Vegetative cell What is the legal age for marriage for females and males in India respectively? 18 years and 21 years 16 years and 18 years 21 years and 21 years 18 years and 18 years Which of the following is a non-medicated IUD? Lippes loop Multiload 375 Progestasert LNG-20 The process where a sperm is directly injected into the ovum in a laboratory setting is: ICSI (Intra Cytoplasmic Sperm Injection) IUI (Intra Uterine Insemination) GIFT (Gamete Intra Fallopian Transfer) ZIFT (Zygote Intra Fallopian Transfer) Emasculation is the process of removing which of the following during artificial hybridization? Anthers from the bisexual flower bud before they dehisce Stigma from the female parent to prevent self-pollination Petals to allow easier access for manual pollination The entire flower from the male parent Which of the following Sexually Transmitted Infections (STIs) is caused by a bacterium? Syphilis Genital Herpes Trichomoniasis Hepatitis B Which part of the embryo sac in angiosperms is responsible for guiding the pollen tube into the synergid? Filiform apparatus Antipodal cells Central cell Egg cell The regenerative process of 'Endometrium' during the menstrual cycle is also referred to as the: Follicular phase Luteal phase Secretory phase Ischemic phase The male gametophyte of angiosperms (pollen grain) is typically shed at which stage in over 60 percent of angiosperms? 2-celled stage 3-celled stage 4-celled stage Single-celled stage Which layer of the uterus undergoes cyclical changes during the menstrual cycle? Endometrium Myometrium Perimetrium Mesometrium What is the ploidy of the secondary nucleus formed by the fusion of two polar nuclei in the central cell of the embryo sac? 2n n 3n 4n Which of the following is an example of a non-albuminous (non-endospermic) seed? Pea Castor Maize Wheat The outer layer of the blastocyst that attaches to the endometrium is called the: Trophoblast Inner cell mass Zona pellucida Blastomere In the 'ZIFT' procedure, the zygote or early embryo is transferred into the: Fallopian tube Uterus Cervix Vagina The process of transformation of spermatids into spermatozoa is known as: Spermiogenesis Spermiation Spermatogenesis Meiosis The secondary follicle is characterized by the formation of a organized layer of cells called: Theca Granulosa Corona radiata Zona pellucida Which of the following contraceptive methods is considered 'reusable'? Diaphragms Condoms IUDs Pills The inner cell mass of the blastocyst contains certain cells called cells which have the potency to give rise to all the tissues and organs. Stem Germ Sertoli Trophoblast The coconut water from a tender coconut represents: Free nuclear endosperm Cellular endosperm Degenerated nucellus The embryo After fertilization, the integuments of the ovule harden to form the: Seed coat Pericarp Perisperm Endosperm Identify the causative agent of Syphilis. Treponema pallidum Neisseria gonorrhoeae Chlamydia trachomatis Haemophilus ducreyi The fluid-filled sac that surrounds the embryo and protects it from mechanical shocks is formed by which extra-embryonic membrane? Amnion Chorion Allantois Yolk sac A multicarpellary, apocarpous gynoecium is found in which of the following plants? Michelia Papaver Hibiscus Tomato Which of the following is a characteristic of insect-pollinated flowers to attract pollinators? Foul odor in some species like Amorphophallus Small, inconspicuous flowers Dry and non-sticky pollen grains Versatile anthers Sertoli cells are found in the testes and their primary function is to: Provide nutrition to germ cells Secrete testosterone for secondary sexual characters Produce the fluid part of the semen Stimulate the process of spermatogenesis via LH The acrosome of the human sperm is a cap-like structure derived from which organelle? Golgi complex Mitochondria Endoplasmic reticulum Lysosome Withdrawal of which hormone is the immediate cause of menstruation in humans? Progesterone Estrogen FSH FSH-RH The process of gastrulation in human embryonic development is characterized by: The differentiation of three germ layers The attachment of blastocyst to the uterine wall The formation of the placenta The first heartbeat of the fetus Which hormone surge is directly responsible for the process of ovulation in the human female? LH (Luteinizing Hormone) FSH (Follicle Stimulating Hormone) Progesterone Estrogen The primary oocyte in human females is arrested at which stage of cell division until puberty? Prophase I of Meiosis I Metaphase II of Meiosis II Anaphase I of Meiosis I Prophase II of Meiosis II Which layer of the blastocyst is responsible for the secretion of enzymes that allow the embryo to implant into the endometrium? Trophoblast Inner cell mass Corona radiata Zona pellucida In Assisted Reproductive Technology (ART), if the embryo has more than 8 blastomeres, it is transferred into the: Uterus Fallopian tube Cervix Vagina Which hormone is responsible for the 'Let-down reflex' (milk ejection) from the mammary glands during breastfeeding? Oxytocin Prolactin Estrogen Progesterone The structure in a flower that represents the 'megasporangium' is the: Ovule Ovary Embryo sac Nucellus Cleistogamous flowers are strictly autogamous because: They do not open at all They lack pollen grains They have large, showy petals They are pollinated by bats The follicle that is characterized by a fluid-filled cavity called antrum and has a primary oocyte within it is the: Tertiary follicle Primary follicle Secondary follicle Graafian follicle In a monocotyledonous seed, the single large shield-shaped cotyledon is known as: Scutellum Coleoptile Coleorhiza Epiblast Which of the following is the correct function of the 'Zona Pellucida' during fertilization? Induces changes in the membrane to block additional sperm entry Secretes enzymes to dissolve the sperm head Provides nourishment to the sperm Directs the sperm toward the secondary oocyte Which of the following events happens during the 'Follicular Phase' of the menstrual cycle? Regeneration of endometrium through proliferation Formation of Corpus luteum Secretion of high levels of progesterone Breakdown of the endometrial lining The labia majora are fleshy folds of tissue which extend down from the mons pubis and surround the vaginal opening. Which male structure is it homologous to? Scrotum Penis Glans penis Prostate gland The hormone 'Relaxin' is produced by which of the following during the later phase of pregnancy? Ovary Uterus Anterior Pituitary Adrenal gland What happens to the corpus luteum in the absence of fertilization? It degenerates, leading to the disintegration of the endometrium It continues to secrete high levels of progesterone to maintain the uterus It transforms into the placenta to support the potential embryo It triggers the release of another egg from the opposite ovary In 'GIFT' (Gamete Intra Fallopian Transfer), what is transferred into the fallopian tube? Ovum collected from a donor Zygote with up to 8 blastomeres Embryo with more than 8 blastomeres Sperm directly into the cytoplasm of the egg The commonest type of embryo sac development in angiosperms, the 'Polygonum type', is: Monosporic, 8-nucleate Bisporic, 8-nucleate Tetrasporic, 8-nucleate Monosporic, 4-nucleate Which of the following Sexually Transmitted Infections is NOT caused by a virus? Trichomoniasis Genital Herpes Hepatitis B AIDS What external changes are visible after the last moult of a cockroach nymph? Mandibles become harder Anal cerci develop Both fore wings and hind wings develop Labium develops Which of the following structures does not open into the genital chamber of female cockroaches ? A pair of collateral glands A single median oviduct Spermatheca A pair of anal cerci Which of the following features is used to identify a male cockroach from a female cockroach? Forewings with darker tegmina Presence of caudal styles Presence of a boat shaped sternum on the 9th abdominal segment Presence of anal cerci Select the correct sequence of organs in the alimentary canal of cockroach starting from mouth Pharynx → Oesophagus → Ileum → Crop → Gizzard → Colon → Rectum Pharynx → Oesophagus → Crop → Gizzard → Ileum → Colon → Rectum Pharynx → Oesophagus → Gizzard → Crop → Ileum → Colon → Rectum Pharynx → Oesophagus → Gizzard → Ileum → Crop → Colon → Rectum If the head of cockroach is removed, it may live for few days because the cockroach does not have nervous system. the head holds a small proportion of a nervous system while the rest is situated along the ventral part of its body. the head holds a 1/3rd of a nervous system while the rest is situated along the dorsal part of its body. the supra-oesophageal ganglia of the cockroach are situated in ventral part of abdomen. Tegmina in cockroach, arises from Mesothorax Metathorax Prothorax and Mesothorax Prothorax Which of the following is characteristic feature of cockroach regarding sexual dimorphism? Dark brown body colour and anal cerci Presence of anal styles Presence of sclerites Presence of anal cerci In both sexes of cockroach, a pair of jointed filamentous structures called anal cerci are present on 5 th segment 10 th segment 8 th and 9 th segment 11 th segment Match List I with List II related to digestive system of cockroach. array llll ; & List I & ; & List II A. & The structures used for storing of food & I. & Gizzard B. & Ring of 6-8 blind tubules at junction of foregut and midgut. & II. & Gastric Caeca C. & Ring of 100-150 yellow coloured thin filaments at junction of midgut and hindgut. & III. & Malpighian tubules D. & The structures used for grinding the food. & IV. & Crop array Choose the correct answer from the options given below: A-IV, B-II, C-III, D-I A-I, B-II, C-III, D-IV A-IV, B-III, C-II, D-I A-III, B-II, C-IV, D-I What is the ploidy of the endosperm in a typical angiosperm? 3n n 2n 4n The development of a large fluid-filled cavity called 'Antrum' is the hallmark of which follicle stage? Tertiary follicle Secondary follicle Primary follicle Graafian follicle Commercial induction of parthenocarpy (fruit production without fertilization) in plants like tomatoes is often achieved by the application of: Auxins Abscisic acid Ethylene Cytokinins What is the specific role of the fructose found in human seminal plasma? Provides the primary energy source for sperm motility Acts as a buffering agent against vaginal acidity Triggers the acrosome reaction upon contact with the egg Prevents the coagulation of semen after ejaculation The 'Filiform apparatus' is a characteristic feature of which cell type in the embryo sac? Synergids Antipodals Central cell Egg cell What is the ploidy of the cells of the nucellus, MMC, functional megaspore, and female gametophyte respectively? 2n , 2n , n , n Solar n , 2n , n , 2n Solar 2n , n , 2n , n Solar n , n , n , n Identify the correct sequence of sperm transport in the male reproductive system. Rete testis Efferent ductules Epididymis Vas deferens Rete testis Epididymis Efferent ductules Vas deferens Efferent ductules Rete testis Vas deferens Epididymis Epididymis Efferent ductules Rete testis Vas deferens Capacitation occurs in: Female reproductive tract Epididymis Vas deferens Rete testis What is the function of the Filiform apparatus? To guide the entry of pollen tube To nourish the pollen grain To prevent self-pollination To stimulate cell division The first sign of the growing fetus may be noticed by listening to the heart sound carefully through the stethoscope. This happens after how many months of pregnancy? One month Two months Three months Four months Medical Termination of Pregnancy (MTP) is considered safe up to how many weeks of pregnancy? 12 weeks 18 weeks 24 weeks 8 weeks The structure that represents the junction between the ovule and the funicle is: Hilum Micropyle Chalaza Raphe In seagrasses like Zostera , pollination occurs in which of the following manners? Pollen grains are long and ribbon-like and carried passively inside water Pollen grains are carried by wind to the surface of water Insects carry pollen to the flowers submerged in water Flowers emerge above the water surface for wind pollination Which of the following components of seminal plasma are essential for the motility and nourishment of sperm? Fructose, Calcium, and certain enzymes Glucose, Sodium, and Phosphorus Sucrose, Magnesium, and Lipids Galactose, Iron, and Vitamin C The signals for parturition originate from: Fully developed fetus and the placenta Placenta only Fully developed fetus only Maternal pituitary only In which of the following plants does pollination occur by insects or wind, even though they are aquatic plants? Water lily and water hyacinth Hydrilla and Vallisneria Zostera and Seagrasses Water hyacinth and Vallisneria Geitonogamy involves: Fertilization of a flower by the pollen from another flower of the same plant. Fertilization of a flower by the pollen from the same flower. Fertilization of a flower by the pollen from a flower of another plant in the same population. Fertilization of a flower by the pollen from a flower of another plant belonging to a distant population. What is the primary function of copper ions released from Copper-releasing Intra Uterine Devices (IUDs)? They suppress sperm motility and fertilizing capacity of sperms. They make the uterus unsuitable for implantation. They inhibit ovulation and gametogenesis. They increase the phagocytosis of sperms within the uterus. During periodic abstinence, couples avoid coitus from day to of the menstrual cycle when ovulation is expected. 10, 17 1, 5 14, 28 5, 10 In some cereals like rice and wheat, pollen grains lose viability within of their release. 30 minutes 2 hours 24 hours 7 days What is the primary advantage of cleistogamy in certain flowering plants? Seed set is assured even in the absence of pollinators It allows for greater genetic variation It promotes cross-pollination to enhance vigor It prevents self-fertilization entirely The scrotum helps in maintaining the low temperature of the testes, which is lower than the normal internal body temperature. 2-2.5 C 4-5 C 1 C 10 C Which of the following hormones is NOT secreted by the human placenta? LH HCG hPL Progesterone In some members of Rosaceae, Leguminosae, and Solanaceae, pollen grains maintain viability for: Months 30 minutes Several years One week The relationship between the Pronuba moth and the Yucca plant is an example of obligate mutualism because: Neither can complete their life cycle without the other The moth eats the seeds of the plant The plant provides nectar only to this moth The moth protects the plant from predators The development of endosperm precedes the development of the embryo because: It provides assured nutrition to the developing embryo It triggers the first cleavage of the zygote It is required for the formation of the suspensor It determines the polarity of the embryo Identify the correct sequence of the male accessory ducts in the human reproductive system starting from the seminiferous tubules. Rete testis -> Vasa efferentia -> Epididymis -> Vas deferens Rete testis -> Epididymis -> Vasa efferentia -> Vas deferens Vasa efferentia -> Rete testis -> Epididymis -> Vas deferens Epididymis -> Rete testis -> Vasa efferentia -> Vas deferens Which hormone is secreted by the human ovary in the later phase of pregnancy? Relaxin hCG hPL Glucocorticoids Copper-releasing IUDs like CuT and Multiload 375 primarily function by: Increasing phagocytosis of sperms and suppressing sperm motility Inhibiting ovulation and implantation Making the cervix hostile to the sperms Blocking the entry of sperms into the uterus Medical Termination of Pregnancy (MTP) is considered relatively safe up to how many weeks of pregnancy according to the MTP (Amendment) Act, 2017? 12 weeks 20 weeks 24 weeks 8 weeks Which of the following Sexually Transmitted Infections (STIs) is NOT completely curable even if detected early? Genital herpes Gonorrhea Syphilis Chlamydiasis In cases where the male partner has a very low sperm count, which ART technique is most suitable? Intra-uterine insemination (IUI) Gamete Intra-fallopian transfer (GIFT) Zygote Intra-fallopian transfer (ZIFT) In-vivo fertilization Which of the following represents the correct sequence of development in angiosperms? Pollination -> Fertilization -> Endosperm development -> Embryo development Pollination -> Fertilization -> Embryo development -> Endosperm development Endosperm development -> Pollination -> Fertilization -> Embryo development Fertilization -> Endosperm development -> Pollination -> Embryo development