Question 1 of 20 2,572 total questions
Floating microscopic heterotrophs are mostly grouped as
A phytoplankton
B zooplankton
C microbes
D nekton
The construction of dams may lead to an increase in the prevalence of
A typhoid fever, measles and yellow fever
B tuberculosis, leprosy and trypanosomiasis
C guinea worm, malaria and tuberculosis
D malaria, bilharziasis and onchocerciasis
Which of the bones is the radius?
The structure labelled II articulates with III to form
A sliding joint
B hinge joint
C pivot joint
D ball-and-socket joint
Th chitin in the exoskeleton of many arthropods is strengthened by
A calcium compounds
B organic salts
C lipids
D proteins
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
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