1. The spermatophytes are also known as ________________________ (a) phanerogams (b) embryophytes (c) land plants (d) flowering plants 2. Seed-bearing plants are __________________________ (a) gymnosperms and pteridophytes (b) angiosperms and bryophtes (c) gymnosperms and angiosperms (d) thallophytes and angiosperms 3. Angio...
1. Which of these allows secondary growth in plant A. Meristem B. Cambium C. Vascularcambium D. Corkcambium 2. What are dioecious plants? A. Plants with separate male and female reproductive organs on different plant B. Plants with separate male and female reproductive organs on different flowers 3. What is pollination Transfer of pollen grains from anther to stigma of same or different flowers 4. What are fruits Fertilized ovary 5. What are seeds Fertilized ovule
1. Which of these characterize high temperature in water A. Thermolimnion B. Epilimnion C. Hypolimnion D. Thermocline 2. Plants take in nitrogen in which form A Nitrate B. Nitrites C. Nitrogen D. Ammonia 3. Which is not a soil component A. Inorganic B. Mineral C. Organic D. Soil water 4. What fixes atmospheric nitrogen A. Azobacter B. Nitrosomonas C. Nitrobium D. Nitrobacter 5. Ecology deals with the study of A. Living beings B. Living and non-living components C. Reci...
1. In grassland ecosystem, the pyramid of biomass is ________ ⚫ Upright ◯ Leaning ◯ Downwards ◯ Inverted 2. Which of the following factors contributes to a regions climate ◯ Altitude ◯ Latitude ◯ Temperature ⚫ All of the above 3. When both partners are affected negatively by the nature of interaction is ____________ ◯ Commensalism ⚫ Competition ◯ Predation ◯ Ammensalism
1. Which of the following does not undergo ecdysis? A. Polychaetes B. Snakes C. Cockroaches D. Insects 2. Which of the following is biramous A. Mites B. Copepods C. Spiders D. Millipede 3. Which of the following is also known as Siphonopoda A. Bivalvia B. Polyplacophora C. Cephalopoda D. Gastropoda 4. Which of the following correctly describes Leucosolenia? A. Sessile, solitary and marine ...
1. Linnean systematics did not initiates a. Natural affinities b. binomial nomenclature c. hierarchical system d. all of the above 2. A taxon consisting of the most closely related specie is called a. kingdom b. family. C. order d. genus 3. Which of the these best refer to a collection of termite of the same specie ? a. Macrotermis spp b. Macrotermis SP c. Macrotermises sp d. Macrotermis sp 4. What is incorrect about this reference in a taxonomic report ? “ the mosquitoes , Anopheles sp...
1. What level of organization is found in members of the Phylum Porifera ◯ Organ level ◯ Organ system level ⚫ Cellular level ◯ Tissue level 2. Which of the following hierarchical arrangement is correct ◯ Species - Order - Infra order - Subclass - Phylum ◯ Species - Subclass - Infra order - Order - Phylum ⚫ Species - Infra order - Order - Sub class - Phylum ◯ Species - Sub class - Order - Infra order - Phylum 3. Which of the following ascending trend of the clas...
(1) Dugesia spp has the following characteristics except ? (a) It is a carnivorous feeder (b) It is non parasitic in nature (c) It has the power of regeneration (d) It has the ability to swim (2) All of the following organism posses Protonephridial except? (a) Fasciola hapatica (b) Gyrodactylus elegans (c) Taenia saginata (d) Hirudino medicinalis (3) Planaria sp differentiates itself from other worms by having one of the following characteristics? (a) Possession of mouth at the posterior en...
1. Chitons has how many pairs of metanephridia A.. B...2 C..1 D...4 Ans:c 2. The larva stage of ctenophorans is A. Cydippid B. Amphiblastula C. planaria D. planular Ans:-A
1. When the solution of a sample was heated and passed with hydrogen sulphide gas. A solid black compound formed. The chemical reaction involved is represented by one of the following A. Pb + S2- PbS B. Fe + S2- FeS *C. Cu + S2- CuS D...
For a certain first-order reaction, it is found that it takes 156 seconds for the concentration of reactant to fall from 0.100M to 0.0500M. How much time would it take for the concentration of reactant to fall from 0.0500M to 0.0250M? a. 165 seconds b. 76 seconds c. 156 seconds d. 98 seconds
1. What is the value of the standard enthalpy of formation for any element under standard conditions? A. 273 J/mol B. 0.24 J/mol C. 4.18 J/mol D. 0 J/mol 2. Which of the following represents an increase in entropy? A. freezing of water B. boiling of water C. crystallization of salt from a supersaturated solution D. the reaction 2 NO(g) ! N2O2(g)
ATOMS, MOLECULES AND NUCLEI ( Answers at the end of all questions )
Question: Almost the entire mass of an atom is concentrated in the__________. a) proton b) electrons c) nucleus d) neutrons Question: Electron was discovered by___________. a) Chadwick b) Thomson c) Goldstein d) Bohr Question: An atom has a mass number of 23 and atomic number 11. The number of protons are_________. a) 11 b) 12 c) 23 d) 44
Question: Which of these pairs of metal has variable valencies? weight : 2 answer : Iron and copper Zinc and caesium Iron and strontium Barium and scandium question: J.J. Thomson’s model of the atom fell into disrepute and was replaced by one of the following weight : 2 option : Dalton’s theory answer : Rutherford Nuclear model option : Bohr model option : Balmer series model