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
- A. toad
- B. lizard
- C. rat
- D. bat
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
In which of the following levels of classification are the members most similar?
- A. Order
- B. Genus
- C. Species
- D. Phylum