Biology Test 2 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 of the following statements is true about Unio? Three-chambered heart Two-chambered heart Four-chambered heart One-chambered heart 2 / 50 Nitrogen makes following percent of gases in atmosphere: 0.03% 20% 80% 78% 3 / 50 Which of the followings is mismatched? Glucagon - pancrease (A) Oxytocin- hypothalamus Thyroid hormone- pituitary gland Insulin -. pancreas 4 / 50 How many senses does a human have? 9 6 4 5 5 / 50 The term Auxin was coined by: T-yabuta 1970 F.W. Went 1926 Hoshimata 1910 Walter 1928 6 / 50 The forest of the world have been reduced by: 30% 60% 44% 54% 7 / 50 Which of the followings are producers? Algae Bacteria Grasshoppers Termites 8 / 50 What is the name of covering the central nervous system? Meninges Skull None of these Spinal cord 9 / 50 The shuffling of alleles due to meiosis and random fertilization having no effect on over all genetic structure of a population signifies: Fischer’s theorem Hardy-Weinberg theorem Went’s theorem Binomial theorem 10 / 50 The color of xanthophyll is: White Orange Green Yellow 11 / 50 Fatal heart attacks in a young High level of blood cholesterol is also done in cancer patients a condition in which liver cells lack receptor for removing cholesterol Kills the cancer cells 12 / 50 Pachytene is a Fourth stage of prophase in meiosis First stage of prophase in meiosis Third stage of prophase in meiosis Second stage of prophase in meiosis 13 / 50 Deserts generally occur in region where annual rain fall is less than: 250-270 cm 5-10 cm 15-20 cm 25-50 cm 14 / 50 The body’s normal metabolic rate is regulated by: Thyroid hormones Prolactin Epinephrine Metaboloxin 15 / 50 Which of the following gasses is released during the process of respiration? None of the above Carbon dioxide Oxygen Hydrogen 16 / 50 Carnivores represent what trophic level? Decomposers Primary consumers Producers Secondary consumers 17 / 50 Which structure is formed as a result of sexual reproduction in Zygomycetes? Sporangiophore Basidiocarp Ascocarp Zygospore 18 / 50 Vegetative propagation does not involve: Stem parts Flower parts Root parts Leaf parts 19 / 50 The total amount of energy that is converted to organic compounds in a given area per unit of time is called the: Net primary productivity Biomass Transpiration Gross primary productivity 20 / 50 An adult human endoskeleton consists of: 639 bones Number varies by the individual 206 bones 363 bones 21 / 50 Grassland in tropic climates have woody trees and are called Velt Savanna Prairies Pampas 22 / 50 According to endosymbiotic theory mitochondria is: Anaerobic bacteria which produces energy Aerobic bacteria which produces energy Cellular body which produce energy Photosynthetic bacteria undergoes photosynthesis 23 / 50 When the kinetochore fibers contract and microtubules elongate, the cell is present in which stage of mitosis? Anaphase Leptophase Telophase Prophase 24 / 50 The mechanism of evolution called “natural selection” was proposed by: Mendel Lamarck Cuvier Darwin 25 / 50 Planaria has: Differentiated cells for regeneration Undifferentiated cells for regeneration None of the above Special cells for regeneration 26 / 50 Blood received from each kidney is ……. 20% 50 10% 80% 27 / 50 Which of the followings is characteristic of parasitism? Two organisms feed side by side from the same food One organism kills and consumes another Two organisms live together and neither is harmed Two organisms nourish each other; both benefit 28 / 50 Bile: Body fluid isotonic to external environment Liver Kidney Large amount of hypotonic urine contain little salt 29 / 50 In which phase does the growth of bacteria take place? Log phase Death phase Stationary phase Lag phase 30 / 50 What is the role of progesterone hormone in women? Follicle development Spermatogenesis Female secondary sex characteristics Development of the uterine lining 31 / 50 Which of the following is not aging? Increase of number of cells Loss of hair pigment Dryness of skin Increase of body weight 32 / 50 Plant need…………..type of nutrient light for photosynthesis? Six Two Three Four 33 / 50 What is the amount of blood contain in the human body? 6-7 liters 4-5 liters 5-6 liters 7-8 liters 34 / 50 The main objection on Lamarckism was that: A character inherited by an organism It cannot pass from parent to offspring It provides raw material for evolution It can pass from parent to offspring 35 / 50 The theory of natural selection says: All living organisms formed from ancestors All living organisms formed spontaneously None of the above All living organisms formed by divine 36 / 50 Muscles are attached to bones by: Tendons Synovial membrane None Ligaments 37 / 50 The largest desert in the world is: Sahara Thar Gobi Thal 38 / 50 Which one doesn't belong to microtubules? Cilia Flagella Centrioles Chloroplast 39 / 50 How many calories are in fat……………..? 6 Calories 9 Calories 4 Calories 8 Calories 40 / 50 Glands in the endocrine system: Produce hormones that are secreted into the digestive tract None of the above Release hormones into the bloodstream or the fluid around cells Release hormones as rapidly as nerve impulses are transmitted 41 / 50 A series of mitotic divisions which take place in a zygote are called: Growth Gastrulation (A) Fertilization Cleavage 42 / 50 Nutrition deficiency Population explosion Alzheimer Scurvy Congenital diseases 43 / 50 Albumin is the most important protein in blood serum. It is produced by Lungs Endocrine glands Liver Heart 44 / 50 Homologous structures: Have different structures and function Have same functions but different structures None of the above Have same structures but different functions 45 / 50 How many ribs are present in the human body? 44 33 12 24 46 / 50 Long term regulations of activities are brought in plants by? Minerals Hormones Organs Salt 47 / 50 Are fungi predominantly diploid or haploid? None Of these Diploid Haploid 48 / 50 How many bones are present in human ears? 3 6 9 8 49 / 50 In which type of fungi asexual reproduction is absent : Basidiomycetes Ascomycetes Deuteromycetes Zygomycetes 50 / 50 During emergencies, the “fight-or-flight” response: is caused by hormone secretions in the adrenal medulla is stimulated by cortisol Decrease the heartrate is the result of aldosterone causing faster blood flow Your score is 0% Restart quiz
