Biology Test 1 Please don't use any search browser to find the answer. Just do it yourself so you can measure your knowledge power.Best of Luck! Please! Enter Password 1 / 50 Which type of tissue enables a person’s fingers to move as he or she plays the piano? Muscle Connective Nerve Joints 2 / 50 Vegetative propagation does not involve: Stem parts Flower parts Leaf parts Root parts 3 / 50 The best description of when ovulation occurs in the human is: 14 days before the beginning of menstruation 14 days after the beginning of menstruation 14 days after the end of menstruation Exactly midway between menstrual cycles 4 / 50 What is the role of progesterone hormone in women? Female secondary sex characteristics Follicle development Spermatogenesis Development of the uterine lining 5 / 50 Human chromosomes have how many nucleotides? 40 million 1000 140 million 10 6 / 50 Glands in the endocrine system: Release hormones into the bloodstream or the fluid around cells None of the above Release hormones as rapidly as nerve impulses are transmitted Produce hormones that are secreted into the digestive tract 7 / 50 The process by which the sperms are produced is known as: Gestation Spermatogenesis Ovulation Oogenesis 8 / 50 Prior to maturation and ejaculation, sperms are stored in the: Seminal vesicle Epididymis Ejaculatory duct Prostate gland 9 / 50 Turner’s syndrome Missing X Diplotene Rapid division Cell cleavage 10 / 50 The three primary soil macronutrients are: Carbon, oxygen and water Potassium, phosphorus and nitrogen Copper, cadmium and carbon Boron, zinc and manganese 11 / 50 What is the total body weight of human skeleton? 18% 80% 70% 40% 12 / 50 During emergencies, the “fight-or-flight” response: is stimulated by cortisol is the result of aldosterone causing faster blood flow Decrease the heartrate is caused by hormone secretions in the adrenal medulla 13 / 50 Lactic acid fermentation takes place In Pancreas Heart Liver Muscles 14 / 50 The hormone involve in birth is: Thyroxin Oxytocin Calcitonin Prolactin 15 / 50 DNA was first discovered in 1869 by: F. Miescher Watson and crick Franklind P.A. Levene 16 / 50 Mango plant is: Xerophyte Mesophyte Hydrophyte None of the above 17 / 50 Planaria has: Differentiated cells for regeneration Special cells for regeneration None of the above Undifferentiated cells for regeneration 18 / 50 Chemotherapy: is also done in cancer patients Kills the cancer cells High level of blood cholesterol a condition in which liver cells lack receptor for removing cholesterol 19 / 50 Which of the followings are formed during gastrulation? Ectoderm All of the above Mesoderm Endoderm 20 / 50 Analogous structures: None of the above Have same structures but different functions Have same functions but different structures Have different structures and functions 21 / 50 Which of the following is a phase of mitosis? Prophase G0 Interphase S phase 22 / 50 Which one of the following structures is haploid? Primary spermatocytes Secondary spermatocytes Sertoli cells Spermatogonia 23 / 50 What is the risk of a colour blind child in a family when mother is colour -blind but father is normal? 50% 25% 100% 75% 24 / 50 What is the mixed gland of the human body? Liver Thyroid Pancreas Pituitary 25 / 50 ------have a limited number of organelles? organ system Prokaryotes None of the above Eukaryotes 26 / 50 The role of cytoplasm in development is: Acts as template to form new structure Turns the genes on and off Receives information from nucleus (Does not take part in development 27 / 50 Ethene Initiates flowering All of the choices are correct Promotes leaf abscission Triggers ripening of fruit 28 / 50 The term niche was first proposed by: Joseph Grinnell Ernst Haeckel Hardy Weinberg Charles Eton 29 / 50 The allele that masks the effects of the other and the masked allele are known as: Homozygous, heterozygous Homozygous, recessive Dominant, recessive Dominant, incomplete 30 / 50 The interstitial cells are found: within the wall of epididymis between the seminiferous tubules lining the wall of vas deferens in the seminiferous tubules of the testes 31 / 50 What proportion of UV radiation from the sun normally absorbed by the atmospheric layer of ozone? around a quarter More than 99% about half Less than 10% 32 / 50 Metabolic water is: (B) and (C) (B) Produced by oxidation of fats (C) Useful to desert mammals (A) Water outside the cells of animals 33 / 50 Double helical structure of DNA was proposed by: Walther Fleming Watson and Crick P.A. Levene F. Miescher 34 / 50 Which among the followings is not a major use of CFCs? Cleaning of computer parts Pressurizing agent in aerosol cans Production of plastic foams Buoyancy gas for blimps and balloons 35 / 50 All other chromosomes except X and Y chromosomes are called: Monosomes Autosomes Pseudosomes Sex chromosomes 36 / 50 Pseudopodia: Endoskeleton Amoeba A.F Huxley Lock jaw 37 / 50 Which stage of the human life cycle occurs first? Adulthood Adolescence Childhood Puberty 38 / 50 The condition of small skull is: Haemophilia Cleft palate Microcephaly Polydactyl 39 / 50 What is the average weight of the human heart? 250g 200g 300g 500g 40 / 50 Which of the following pollutants causes ozone holes in the ozone layer? CFC CO2 CO SO2 41 / 50 Excessive production of thyroid hormones by the thyroid gland: can cause a goiter is called hypothyroidism can cause stunted growth and retardation in children can cause nervousness, irregular heartbeat, and weight loss 42 / 50 The highest part of the nervous system is: Dorsal root ganglia of thoracic nerves Medulla oblongata The highest part of the nervous system is: Cerebral cortex 43 / 50 Birds maintain their body temperature within a range of: 41C to 43C 25C to 35C 30C to 40C 36C to 38C 44 / 50 Fungi animals and plants may consist of up to? Trillions of cells Billions of cells Millions of cells None of the above 45 / 50 During emergencies, the “fight-or-flight” response: is the result of aldosterone causing faster blood flow is caused by hormone secretions in the adrenal medulla Decrease the heartrate is stimulated by cortisol 46 / 50 Cell death: Mitosis Turner’s syndrome Klinefelter’s syndrome Necrosis 47 / 50 Which of the following traits is not sex-linked recessive? tfm syndrome Hypophosphatemic ricket Colour blindness Haemophilia 48 / 50 The liver is: All options are incorrect Smallest internal organ Body s largest internal organ Medium-sized internal organ 49 / 50 What is a chromatid? A special region that holds two centromeres together A chromosome in G1 of the cell cycle A chromosome found outside the nucleus A replicate chromosome 50 / 50 A neuron with its axon connected to another neuron and its dendrites connected to a receptor: Sensory Association Unipolar Motor Your score is 0% Restart quiz
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