MDCAT Biology Online Test With Answers

image
image
image

MDCAT Biology Online Test

Sr. # Questions Answers Choice
1 Who for the first time found white eye mutant in drosophila ? Morgan Bridges Correns De Varies
2 How may gene pairs contribute to the wheat grain colour? one two three four
3 A heterrozygote offspring quantitatively exceeds the phenotypic expression of both the homozygote parents due to: dominance incomplete dominance over dominance codominance
4 What happens when both alleles of a gene pair independently express in a heterozygote? dominance incomplete dominance over dominance codominance
5 When a single gene has multiple phenotypic effects, the phenomenon is called: condominance epistasis pleiotropy sex-linkage
6 The gill pouches present in embryos of mammals : support that ontogeny recapitulates phylogeny homologous structures used by embryos to breathe evidence for the degeneration
7 A mixture of sand and clay in: Silt Kaolin Humus Loam
8 In which types of soil does water logging occur? Silt Clay Gravel Sand
9 Plants growing in extreme cold soil are called: Sciophytes Psychrophytes Heliophytes Cyanophytes
10 Which rule depicts its correct statement regarding temperature variation? <u>Allen's Rule:</u><div>Birds and mammals have greater size in cold region</div> <u>Bergman's Rule:</u><div>The tail snout and ears are smaller in colder region.</div> <u>Jordan's Rule:</u><div>Birds in cold regions are with narrow wings.</div> All are false.
11 Dormancy in animals through a drought or dry season is called: Eurythermal Diapause Aestivation None of these
12 Many cold=blooded animals remain inactive during winter season; it is called: Hibernation Condensation Morphosis Proto-operation
13 Abiotic factors include: Geomagnetism Gravity Water All these
14 Tick the biotic (intra-specific) factors: Wave action, humidity, light Colonization,aggregation,parental care Neutralism,mutualism,predation Mineral elements, mutualism,parasitism
15 Two main types of environment factors are: Geotropism and phototropism Abiotic and biotic Land aquatic None of these
16 _____is the study of interaction between living organism and their environment Evolation Genetics Ecology Sociology
17 Nutrient cycle are also called us: Biogeochemical cycles Elemental cycles Geochemical cycles Biochemical cycles
18 Over-grazing may lead to: Desert Tundra Taiga Grassland
19 The type of association between two organisms, which brings benefit to both the organisms is called Commensalism Predation Mutualism Parasitism
20 The animal that is caught and eaten away is called Victim Prey Predators Host
21 Actual place or location where an organism lives is called us: Niche Terrain Habitat Domain
22 Major unit of ecology is : Ecosystem Community Biosphere Population
23 Shallow water zone of the lake near the shore is called: Intertidal zone Littoral zone profundal zone Limnetic zone
24 Grasslands of tropic climate have woody trees and are called: Alpine Boreal Biome Savanna
25 Dominant plant species in grassland are: Graminoids Trees Climbers Herbs
26 Dominant species of mammals in grassland are the: Omnivores Herbivores Carnivores Insectivores
27 Sahara Desert i found in : Europe America Africa Australia
28 Coniferous forests located at high latitude are called Boreal Taiga Tundra Alpine
29 A common animal of temperate deciduous forests is the: Kangaroo Cat Leopard Rhesus Monkey
30 A dominant plant of temperate deciduous forests is the : Euphorbia Taxus baccata cactus Acacia
31 Limnetic phytoplanktons include: Mossses Algea Bacteria Cyanobacteria
32 Coniferous forests of high altitude are known as: tundra Boreal Alpine Arctic
33 The living organisms, which cannot prepare their own food but obtain ready-made food form others, are: primary and secondary consumers secondary and tertiaryconsumers only primary consumers consumers
34 The living organism which can prepare their own food are: predators parasites producers prey
35 When living and non-living interact to produce a stable system in which exchange of materiel with flow of energy takes place, it forms a/an: environment ecosystem stable community ecological succession
36 Similar groups of individuals who can interbreed and produce organisms of their own kind form a: population community species succession
37 The study of relationship of an organism to their environment is knows as: biology ecology zoology mycology
38 Urine is preferably used as a vehicle for biotechnology product than: Blood Milk Plasma Tissue fluid
39 About three billion base pairs are present in the genome of a Horse Dog Man Monkey
40 Soyabeans have been made resistant to a common Insecticide Herbicide Fungicide Pesticide
41 According to Darwin descent with modification means Same ancestor Same characters Different ancestors Different characters
42 Wallace developed a Theory of Natural Selection similar to that of Lamarck Linnaeus Darwin Lyell
43 Darwin published " The Origin of Species" in 1840 1844 1858 1859
44 Which of the following things were not collected by Darwin? Specimens of diverse faunas and floras of south America South American fossils 13 types of finches Turtles
45 Charles Darwin was born in Shrewsbury, in Western England in 1854 1807 1809 1866
46 The idea of inheritance of acquired characteristics was presented by Margulis Lamarck Linnaeus Cuvier
47 Lamarck published his theory of evolution in 1822 1812 1817 1809
48 Lamarck was incharge of invertebrate collection at Natural History Museum is Berlin Paris California Brun
49 Which of the following hypothesis involved the evolution of eukaryotic cell from a prokaryotic cell Endosymbiont hypothesis Membrane invagination hypothesis Vent hypothesis Both A and B
50 According to endosymbiont hypothesis the aerobic bacteria developed into Lysosomes Mitachondria Chloroplast Nucleus
51 Endosymbiont hypothesis was first proposed by Lynn Margulis Malthus Cuvier Darwin
52 The prokaryotes may have arisen more than 420 million years ago 42 billion years ago 3.5 billion years ago 1.5 billion years ago
53 Essay on "Principles of geology" was published by Wallace Malthus Lyell Cuvier
54 Essay on "Principle of population" was published by Cuvier Mendel Malthus Darwin
55 Among the scientists who believed in divine creation as Darwin Carolous Linnaeous Lamarck Wallace
56 The concept that all living things came into existence in their present forms especially created by Nature is called as Theory of special creation Theory of special selection Theory of natural creation Theory of natural selection
57 Darwin proposed a mechanism for evolution, which he termed Natural selection Special reaction Adaptation Descent with modification
58 The first person who argued from evidence that species were not created in their present form rather they had evolved from ancestral species was Aristotle Lamarck Darwin Mendel
59 The processes that have transformed life on earth from its earliest forms to the vast diversity that we observe today, are collectively referred as Evolution Succession Revolution All of above
60 Allele for whiteness in Drosophilla is Recessive Codominant Dominant Partially dominant
61 Normal fruit flies have White eyes Bright red eyes Light red eyes Black eyes
62 Tritanopia is blindness of Red Colour Green Colour Blue Colour Pink Colour
63 X and Y linked genes are also called as Sex genes Dominant genes Autosomal genes Pseudoautosomal genes
64 All chromosomes other than sex chromosomes are called Linked Chromosomes Autosomes Autophagosommes Dictyosomes
65 An exchange of segments between non-sister chromatids of homologous chromosomes during meiosis is termed as Crossing over Hopping Taking over Segregation
66 Rh factor or antigen was first studied in Man Owl Monkey Fish
67 Which of the following cross is carried to check the genotype of an individual showing a dominant phenotype Check cross Test Cross Criss cross Self cross
68 The dominance relations of a 4 O'clock plant can be described in terms of Complete dominance Incomplete dominance Partial dominance Both B and C
69 On poles, the average temperature is Zero°C 5°C Below freezing point None
70 The ecosystem present on land or soil is called Terrestrial ecosystem Lithospheric ecosystem A and B none
71 Fresh water ecosystem covers less than ______% of the hydrospheric ecosystems 2 3 1 4
72 The amount of energy left after plant have met their respiratory need is net primary production called as Mass Gross production Biomass None
73 Dandruff is caused by Algae Bacteria Fungi Virus
74 A ______of energy can be constructed showing energy transfer in a community of organisms Pyramid Triangle Rectangular None of above
75 Between 80 to 90% of the original energy is lost as heat as a byproduct of Photosyntheis Urine Respiration All of the above
76 About ______% of solar energy is used to evaporate water, heat up soil and then lost to the outer space 95 97 98 99
77 About ______% if the total energy from the sun is trapped by the producers in an ecosystem 0.5 1.0 1.5 2.0
78 The total amount of energy fixed by plants is ______ productions Gross primary Net primary Secondary All of the above
79 Soil nitrogen resources are also strengthened by the addition of ______ by the man himself Nitrogen fertilizers Nitrogen Fertilizers None of above
80 ______ incorporate gaseous nitrogen from air into organic nitrogen containing compounds Nitrogen fixing bacteria Nitrogen degrading bacteria Both A and B None of above
Download This Set
×