Question 1 of 20 50 total questions
The condition that encourages denitrification is
A low soil oxygen
B high soil nitrogen
C absence of soil bacteria
D lightening and thunderstrom
Which of the following is the direct consequence of transferring energy from one trophic level to another?
A An increase in biomass
B A decrease in the efficiency
C An increase in the total numbers of resulting individuals
D A decrease in the resulting biomass
A group of organisms of different species living in a particular area is described as a
A colony
B community
C population
D niche
The corolla is partly represented by
The small masses of nervous tissues in which many neurones have their nuclei are called
A dorsal roots
B ventral roots
C ganglia
D synapses
The outermost embryonic membrane in the mammal is the
A amnion
B chorion
C allantois
D yolk sac
A dry fruit formed from two or more carpels containing several seeds is a
A follicle
B legume
C capsule
D schizocarp
The most reliable estimate of growth is by measuring changes in
A length
B volume
C surface area
D dry weight
A half-superior
B inferior
C superior
D half-inferior
Which of the following is not a function of the mammalian skeleton?
A Protection
B respiration
C Transportation
D Support
In which of the following groups of animals is the malpighian tubule found?
A Lizards, snakes and frogs
B Crickets, houseflies and grasshoppers
C Millipedes, centipedes and scorpions
D earthworms, roundworms and flatworms
Which of following movements occur during exhalation?
A The diaphragm and intercostal muscles relax
B The thoracic cavity increases in volume
C The diaphragm and intercostal muscles contract
D The diaphragm contracts and the intercostal muscle relax
In adult mammalian blood, the cells which lack nuclei are the
A erythrocytes
B lymphocytes
C leucocytes
D phagocytes
The heart of the adult frog consist of
A two auricles and two ventricles
B one auricle and one ventricle
C two ventricle and one auricle
D one ventricle and two auricles
Unicellular organisms transport essential nutrients directly to all parts of their bodies by the process of diffusion because, they have
A a large volume of surface area ratio
B a large surface area to volume ratio
C their bodies immersed in the nutrients
D their outer membrane made of cellulose
Regulation of blood sugar level takes place in the
A pancreas
B iluem
C liver
D kidney
In million's test, when the reagent is added to a protein food item, a white precipitate is produced which turns
A blue on heating
B yellow on heating
C green on heating
D red on heating
In a water culture experiment, a plant showed poor growth and yellowing of the leaves. These may be due to deficiency in
A copper
B iron
C magnesium
D calcium
The manufacture of carbohydrates by plants takes place only in
A the leaves
B the green stems
C chlorophyllous parts
D flowering plants
Which of the following structures is capable of producing more tissues in the stem of a herbaceous flowering plant?
A Epidermis
B Pericycle
C Xylem
D Cambium
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