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