Question 1 of 19 2,099 total questions
Which structure in the maize grain stores food?
A Radicle
B Embryo
C Cytoplasm
D Seed coat
E Endosperm.
Which of the following is not correct about a fruit? lt
A may contain many seeds
B is a mature ovary
C is covered by the pericarp
D may develop from the receptacle
E possesses only one scar.
Which of the following specialized structures are stimulated by touch, pressure, pain, heat and cold?
A Receptors
B Synapse
C Cell bodies
D Myelin sheath
E Relay neurones
The brain and the spinal cord make up the
A pheripheral nervous system
B automatic nervous system
C central nervous system
D somatic nervous system
E sympathetic nervous system
Auxins are produced in the
A petiole of leaves
B parenchyma of roots and shoots
C epidermis of roots and shoots
D apical regions of roots and shoots
E sclerenchyma tissues of roots and shoots
The pituitary is called 'master gland' because
A it is locatd in the brain
B its secretion are the more numerous than those of the other gland
C its secretion controls the other glands
D it is the only organ that produces hormone
E it regulates muscular movements
Which of the following statements is correct of hormones? Hormones are
A secreted into the blood through ducts
B secreted directly into the blood streem
C inactive chemical substance in the blood stream
D non-specific in their mode of action
E secreted at the site of the needed organ
Co-ordination is achieved in the body of mammals through the action of the
A endocrine and nervous systems
B skeletal and nervous systems
C muscular and nervous systems
D circulatory and nervous systems
E skeletal, muscular and nervous system
The pigment in the malphigian layer responsible for skin colouration is known as
A haemoglobin
B haemocyanin
C chlorocruorin
D haemoerythrin
E melanin
Which of the following statements on urine production is not correct?
A Concentrated urine is produced under the control of antidiuretic hormone
B The total volume of urine produced depends on the need for water excretion
C if there is excess intake of water, dilute urine is expected
D if there is a shortage of water in the body the volume of the urine produced is decreased
E in the presence of antidiuretic hormone dilute urine is produced
Deamination is the process during which
A excess amino acid is broken down into ammonia and keto acid
B fats and oil are converted into an emulsion for absorption
C excess glucose is converted and store as glycogen in the liver
D glycogen is reconverted into glucose through the action of glucagon
E excess amino acid is converted into proteins
The thoracic cavity is separated from the abdominal cavity by a sheet of muscle called
A pleural membrane
B intercostal muscles
C diaphragm
D pericardium
E epiglottis
Which of the following blood components has the greatest affinity for oxygen and carbondioxide?
A Blood plasma
B Leucocytes
C Thrombocytes
D Erythrocytes
E Lymphocytes
The pulmonary artery carries
A deoxygenated blood from the right ventricles to the lungs
B oxygenated blood from the right ventricle to the lungs
C oxygenated blood from the left ventricles to the ventricles to the right auricle
D deoxygenated blood from the left ventricles to the right auricles
E oxygenated blood from the lings to the right auricles
THe bicuspid valve is located between the
A left auricle and left ventricle
B aorta and left ventricle
C superior vena cava and inferior vena cava
D right auricle and superior vena cava
E right auricle and right ventricle
Double fertilization is said to occur in flowering pants because?
A two embryos are formed
B one egg is fertilized twice
C two sperms fertilize each egg
D one embryo and endosperm nucleus are formed
E two sperms and two pollen grains are involved
The ability of organisms to maintain a constant internal environment is known as
A diuresis
B endosmosis
C plasmolysis
D dialysis
E homeostasis
This stage of mitosis is characterized by the
A movement of the chromosome to the poles
B arrangement of chromosomes on the equitorial planes
C centromeres moving apart along the spindle
D interaction of the spindles with the chromosomes
E condensation of chromosomes and formation of spindles
what stage mitotic division is represented in the diagram of the cell illustrated above
A Prophase
B Telophase
C Anaphase
D Metaphase
E Interphase
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