Question 1 of 20 5,032 total questions
The process by which plants manufacture food from carbon dioxide and water using energy from the sun is called
A chemosynthesis
B photosynthesis
C anabolism
D catabolism
The resolution of a microscope refers to its power to
A increase an object's apparent size
B distinguish clearly between two objects
C scan the surface of an object
D focus on an object
Which of the following structures is not essential in a wind pollinated flower?
A Anther
B Ovary
C Stigma
D Petal
Which of the following conditions would result result in a decrease in the production of antidiuretic hormone?
A Abnormally high blood sugar level
B Drinking large quantities of water
C Increase in osmotic pressure of blood
D Period of strenuous exercise
Which part of the nephron is associated with ultra-filtration?
A Distal convoluted tubule
B Proximal convoluted tubule
C Collecting duct
D Bowman's capsule
The maintenance of a stable internal environment within the body of a mammal is known as
A osmosis
B plasmolysis
C homeostasis
D excretion
In humans, excretion of hypertonic urine is associated with the
A distal convoluted tubule
B loop of Henle
C bowman's capsule
D proximal convoluted tubule
A substance present in the glomerular filtrate in the mammalian Kidney is
A glucose
B fibrinogen
C albumen
D blood platelets
Which of the following structures is used for respiration in insects?
A Lungs
B Thorax
C Cuticle
D Spiracles
Which of the following statements about the diaphragm of a mammal is not correct? it
A separates the thorax and the abdomen
B is a thick layer of muscle
C is made of epithelial cells
D is part of the human respiratory apparatus
Which of the following organs are used for gaseous exchange in a mature toad?
A Gills, lungs and eardrum
B Lungs, mouth and eardrum
C Mouth, skin and gils
D Skin, lungs and mouth
Which of the following statements is not correct about the mammalian heart?
A Oxygenated blood enters the left auricle from the pilmonary vein
B the walls of the ventricle are thicker than those of the auricle
C blood passes from of blood into the right ventricle to the left auricle through the aorta
D the tricuspid valve prevents the back flow of blood into the right auricle
Which of the following is not a skeletal tissue?
A Plasma
B Chitin
C Cartilage
D Bone
Anaerobic respiration results in the production of
A more energy than aerobic respiration
B no energy
C an equal amont of energy to aerobic respiration
D less energy than aerobic respiration
What happens to a plant if the shoot tip is cut off and replaced by an agar block containing auxin? it will
A stop growing
B grow rapidly
C continue to grow normally
D die completely
The opening of the guard cells of the epidermis in plants is by the process of
A osmosis
B diffusion
C active transport
D transpiration
An animal which possesses scales nares and a backbone is likely to be a
Which of the following sequences is the correct arrangement of tissues in the anatomy of a young dicotyledonous stem from the inside to the outside ?
A pith , phloem, cambium, xylem, parenchyma, collenchyma and epidermis
B Xylem, phloem, cambium, cortex, endodermis, collenchyma and epidermis
C Pith,xylem, cmbium,phloem,, collenchyma, parenchyma and epidermis
D phloem, xylem, cambium, cortex, endodermis, collenchyma and epidermis
Which of the following pairs of structures in living organisms do not perform similar functions?
A Lungs and spiracles
B Root hairs and mammalian hairs
C Feathers and scales
D Contractile vacuole and Kidneys
Spirogyra is regarded as a multicellular plant because
A the cylindrical cells are linked end to end
B its cells are linked together by cytoplasmic strands
C its cells are large
D it is an algae containing a large vacuole
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