Description : In the life history of cockroach (Periplaneta) there is :
Last Answer : In the life history of cockroach (Periplaneta) there is : A. No Metamorphosis B. Gradual metamorphosis C. Complete metamorphosis D. Anamophosis
Description : Periplaneta americana differs from Blatta orientalis in having
Last Answer : Periplaneta americana differs from Blatta orientalis in having A. Well developed wings B. Wings ... wings develped D. Second pair wing developed
Description : Tongue like structure in periplaneta is :
Last Answer : Tongue like structure in periplaneta is : A. Maxilla B. Hypopharynx C. Labium D. Labrum
Description : During metamorphosis, under the ecodysone hormone moulting occurs_____ times in Periplaneta-
Last Answer : During metamorphosis, under the ecodysone hormone moulting occurs_____ times in Periplaneta- A. `3 - 5` B. 15-20 C. 13 D. `1-2`
Description : Which one of the following has an open circulatory system? (a) Octopus (b) Pheretima (c) Periplaneta (d) Hirudinaria
Last Answer : (c) Periplaneta
Description : Assertion (A) : Periplaneta americana is nocturnal, omnivorous, household pest. Reason (R) : It is because it acts as scavenger. (a) A is true but R is false. (b) A is false but R is true. (c) Both ... R is correct explanation of A. (d) Both A and R are true but R is not correct explanation of A
Last Answer : (d) Both A and R are true but R is not correct explanation of A.
Description : Select the correct statement from the ones given below with respect to Periplaneta americana. (a) Nervous system located dorsally, consists of segmentally arranged ganglia joined by a pair of longitudinal ... midgut and hindgut. (d) Grinding of food is carried out only by the mouth parts.
Last Answer : (b) Males bear a pair of short thread like anal styles.
Description : Which one of the following is one of the paths followed by air or O2 during respiration in the adult male Periplaneta americana as it enters the animal body? (a) Spiracle in ... prothorax, tracheoles, trachea, oxygen diffuses into cells (d) Hypopharynx, mouth, pharynx, trachea, tissues
Last Answer : (a) Spiracle in metathorax, trachea, tracheoles, oxygen diffuses into cells
Description : Which of the following features is not present in Periplaneta americana? (a) Exoskeleton composed of N-acetylglucosamine (b) Metamerically segmented body (c) Schizocoelom as body cavity (d) Indeterminate and radial cleavage during embryonic development
Last Answer : (a) Exoskeleton composed of N-acetylglucosamine
Description : In which one of the following, the genus name, its two characters and its phylum are not correctly matched, whereas the remaining three are correct? (a) Pila (i) Body segmented Mollusca ... Porifera (ii) Canal system (d) Periplaneta (i) Jointed appendages Arthropoda (ii) Chitinous exoskeleton
Last Answer : (a) Pila (i) Body segmented Mollusca (ii) Mouth with radula
Description : Select the correct statement from the ones given below with respect to Periplaneta americana (1) Grinding of food is carried out only by the mouth parts (2) Nervous system located dorsally, consists ... (4) There are 16 very long Malpighian tubules present at the junctions of midgut and hindgut
Last Answer : (3) Males bear a pair of short thread like anal styles
Description : Which scientist gave the formula of gravitational ball ?
Last Answer : Scientist Newton gives the formula for the gravitational ball.
Description : Which scientist gave the idea of atomic number ?
Last Answer : Henry Mosle gave the idea of atomic number.
Description : Which scientist gave the formula of Mahakarya ball ?
Last Answer : Scientist Newton gave the formula for the gravitational ball.
Description : Which country's scientist gave the idea of making a robot ?
Last Answer : Greek scientists came up with the idea of making robots.
Description : Which scientist gave the initial idea of survival of the fittest :
Last Answer : Which scientist gave the initial idea of survival of the fittest : A. Wallace B. Spencer C. Darwin D. Mendel
Description : This scientist gave the law- ‘Properties of elements are a periodic function of their atomic number.’ This property of the fundamental importance of atomic number was discovered by- (1) Johann Wolfgang Döbereiner (2) John Newlands (3) Dmitri lvanovich Mendeléev (4) Henry Moseley
Last Answer : (4) Henry Moseley Explanation: In 1913, Henry Moseley showed that the atomic number of an element is a more fundamental property than its atomic mass as described below.
Description : The scientist who gave symbols for ele- ments on the basis of their names?
Last Answer : John .J. Berzelius
Description : The first scientist who gave a definition to element is?
Last Answer : Robert Boyle