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WorksheetsCLASS XI ONLINE PA2 EXAMINATION BIOLOGY
Total questions: 25
Worksheet time: 25mins
In plants growth occurs ___________ where as in animals, it occurs ____________.
Only upto a certain age, continuously
Continuously, only upto a certain age
Continuously, continuously
Only up to a certain age, only upto a certain age
Mangifera is a
Class
Family
Genus
Species
In taxonomic hierarchy, cats are placed under the genus
Felis
Canis
Panthera
None of these
The classification system proposed by lineas was a __________ Kingdom system of classification.
Two
Three
Four
Five
Siliceous frustules of diatoms being Indestructible, piled up at the bottom of ocean and formed a thick bed over billions of years. Such as thick bed is known as
Red sea
Diatomaceous earth
Pseudorocks
Red tides
Fungi lacking cross walls in the mycelium belong to class
Phycomycetes
Ascomycetes
Basidiomycetes
Deuteromycetes
Identify the animal and name the Phylum to which it belongs to
Balanoglossus, hemichordata
Balanoglossus, cephalochordata
Nereis, Urochordata
Nereis, Annelida
Which of the following is not a characteristic feature of sponges?
Cellular level of organisation
Presence of ostia
Intracellular digestion
Body supported by chitin
Which of the following have acoelomate body
Aschelminthes
Arthropoda
Annelida
Platyhelminthes
Folowing part of the root divides actively (has meristem tissue):
Root cap
Root hairs
A few millimetres above the root cap
None
Pneumetaphoric roots of swamp plant move upward to provide:
Food from air
Oxygen from atmosphere
Water from humidity
None of these
In cymose inflorescence, floral axis:
Terminates into a flower
Grows continuously and flower appears laterally
Does not terminate into a flower
None of these
Which one of these is not a eukaryote?
Euglena
Anabaena
Spirogyra
Agaricus
Plastid differs from mitochondria on the basis of one of the following features. Mark the right answer.
Presence of two layers of membrane
Presence of ribosome
Presence of chlorophyll
Presence of DNA
Select one which is not true for ribosome
Made of two sub units
Form polysome
May attach to mRNA
Have no role in protein synthesis
The complex formed by a pair of synapsed homologous chromosomes is called
Axonema
Synaptonemal complex
Chiasma
Equatorial plates
Second division of meiosis is
Reductional division
Multiplied division
Equational division
None of the above
Meiosis takes place in
All body cells
All germ cells
Both body cells and germ cells
None of the above
The process which makes major difference between C3 and C4 plants is :-
Photorespiration
Respiration
Glycolysis
Calvin cycle
Reaction centre of PSI is
P700
P680
Chl715
Chl685
What is a light reaction?
Formation of glucose
Formation of sucrose
Trapping of light in the form of ATP and NADPH
None of these
C02 dissociates from carbaminohaemoglobin when
pC02 is high and p02 is low
p02 is high and pC02 is low
pC02 and p02 are equal
None of the above
The covering of lung is called
Pericardium
Perichondrium
Pleural membrane/ pleura
Peritoneum
Exhalation is the process of expulsion of air through the respiratory tract. Which figure illustrates the process of exhalation?
The respiratory center in the brain is stimulated by
CO2 concentration in venous blood
O2 concentration in arterial blood
CO2 concentration in arterial blood
O2 concentration in venous blood
