Question 1 of 20 110 total questions
In mammals, the organ which performs digestive and endocrine functions is the
A liver
B pancreas
C gastric gland
D salivary gland
The structure labelled II is known as
A sweat gland
B lymph vessel
C blood vessel
D nerve ending
The part labelled III is for
A protection
B insulation
C lubrication
D growth
The correct sequence for the perception of smell in mammals is
A chemicals → olfactory nerve endings → brain
B dissolved chemicals → nasal sensory cell → brain
C chemicals → mucus membrane → sensory cells→ brain
D dissolved chemicals → sensory cells → olfactory nerve → brain
Bacteria multiply rapidly by means of
A budding
B fragmentation
C binary fission
D spore formation
In epigeal germination, the cotyledons are
A carried above the ground by the elongation hypocotyl
B pulled underground by the elongating epicotyl
C pulled underground by the elongating epicotyl
D carried above the ground by the elongating epicotyl
Insects visit flowers in order to
A feed on the nectar
B deposit pollen on the stigma
C pollinate the flowers
D transfer pollen from anthers
Fertilization in humans usually takes place in the
A lower part of the uterus
B upper part of the uterus
C lower part of the oviduct
D upper part of the oviduct
In dissection, the rib cage of mammal has to be opened in order to expose the
A diaphragm
B liver
C heart
D sternum
The lymphatic system of mammals rejoins the blood circulatory system at the
A hepatic vein
B subclavian vein
C renal vein
D common iliac vein
Yellowing of leaves is a symptom associated with deficiency of
A iron, calcium and magnesium
B nitrogen, sulphur and potassium
C sulphur, phosphorus and iron
D magnesium, nitrogen and iron
The force that holds water together in the form of a stream within the xylem tube is the
A cohesion of water molecules to one another by hydrogen bonds
B force of gravity attacking the water molecules through the hydrogen bonds
C attraction between the water and xylem osmotic force
D normal flow of water from the ground with help of gravitational force
The richest source of vitamin A are
A palm oil and groundnut oil
B palm oil and carrot
C rice and groundnut oil
D oranges and carrot
The modes of nutrition in Nitrobacter, Ascaris and Homo sapiens respectively are
A photosynthetic , parasitic and holozoic
B chemosynthetic, parasitic and holozoic
C photosynthetic, parasitic and heterophytic
D chemosynthetic, holophytic and holozoic
Mammals acclimatize to reduced oxygen content at high altitudes by
A the stimulation of marrow to reduce the amount of erythrocytes produced
B increasing the rate at which erythrocytes are destroyed
C the stimulation of marrow to produce more erythrocytes
D increasing the break down of the protein portion of the erythrocytes
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
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