Question 1 of 20 2,572 total questions
The dark reaction of photosynthesis involves
A fixation of carbon (IV) oxide to give six-carbon sugar
B fixation of carbon (IV) oxide with the help of oxygen
C use of carbon (IV) oxide to produce glucose using ATP
D fixation of carbon (IV) oxide on chlorophyll using hydrogen
After a meal of yam has been digested, the highest concentration of glucose is to be found in the
A hepatic artery
B pulmonary vein
C hepatic portal vein
D posterior vena cava
Substance manufactured by the leaves are transported to other parts of the plant through the
A phloem
B companion cells
C sieve tubes
D cambium
In the woody stems, gaseous exchange takes place through the
A micropyles
B stomata
C lenticels
D vessels
In plant cells, the chloroplast are located
A inside the cell wall
B outside the protoplasm
C within the vacuole
D within the cytoplasm
They key event in the transition of the amphibians from water to land is the
A replacement of the gills with lungs
B possession of webbed limbs
C development of long hing limbs
D possession of tympanic membrane
In which of the following organisms does each cell combine the function of nutrition, reproduction and growth?
A Rhizophus
B Dryopteris
C Brachymenium
D Spirogyra
The division of a body into two equal halves along a longitudinal plane is called
A bilateral symmetary
B transverse section
C radial symmetry
D longitudinal section
The structure labeled III represents the
A mandible
B palp
C proboscis
D labium
The structure labelled II is used for
A tasting
B feeling
C biting
D sucking
Which of the following is an organ?
A Guard cell
B Liver
C Xylem bundle
D Blood
The structure that is most commonly identified in all living cells under the light microscope is the
A mitochondrion
B chloroplast
C nucleus
D ribosome
The group of Arthropods that has no antennae is the
A Crustacea
B Chilpoda
C Arachnida
D Diplopoda
The possession of scales, laying of eggs with shells and bony structure of the head are characteristics shared by
A birds and reptiles
B fishes and birds
C reptiles and fishes
D birds and molluscs
The organism that has a hydrostatic skeleton is
A Tilapia
B Hydra
C mosquito larva
D earthworm
The basic point of impact by changes which produce mutation is the
A gametes
B chromosomes
C phenotype
D zygote
The best explanation for the theories of natural selection is that
A all organisms have equal capacity for survival in their habitats
B organisms have varying capacities for survival in their habitats
C organisms compete for resource and better competitors survive and thrive
D habitats allow only organisms that will not have to compete for survival
In the whistling pine, leaves are reduced to brown scales and young stems are green. This is an adaptation for
A obtaining food
B conserving nutrients
C storing water
D reducing transpiration
In the honey bee colony, the drones are
A sterile males with reduced mouth parts
B sterile males with well-developed mouth parts
C fertile males with reduced mouth parts
D fertile males with well-developed mouth parts
Toes of the feet ending in sharp, curved hook suitable for holding and tearing are most likely to belong to the bird with the bill in
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