Which of the following are characteristics of surfaces for gaseous exchange?
Large surface area, thinness and moistness.
Thinness, moistens and presence of the blood vessels.
Large surface area thinness and presence of arteries and veins.
Thinness, moistness and presence of arteries and veins.
Stunted plant growth, creamy yellow leaves and poor fruit development is caused by deficiency of
nitrogen and potassium.
nitrogen and phosphorous.
potassium and iron.
nitrogen and iron.
Which one of the following dental formula is that of a sheep
I 0 C 0 Pm 3 M 3 2 0 3 3
I 2 Pm 2 M 3 2 2 3
I 3 C 0 Pm 3 M 2 3 0 3 2
I 2 C 1 Pm 2 M 3 2 1 2 3
Enzymes differ from catalyses because enzymes
are required in small amounts.
respond to temperature changes.
are protein in nature.
speed up reactions.
When preparing to test for starch in a leaf, the leaf is boiled in alcohol in order to
burst chloroplasts.
remove coloured materials in the leaf.
quicken the reaction of starch with iodine.
soften the leaf.
In which of the following animals does expired air take a different route from that of inspired air?
Birds.
Reptiles
Bony fish
Mammals
Which one of the following does not aid flight in birds
Pectoral muscles.
Hollow bones.
Down feathers
Quill feathers.
Which one of the following sets of organisms belong to the same group?
Butterfly, beetle and starfish.
Crab, tapeworm and liver fluke.
Scorpion, mite and spider.
Jelly fish, slug and spider.
Which one of the following explains the accumulation of lactic acid in muscles during vigorous activity?
Carbohydrates is completely broken down
The oxygen supply to the muscles may not be enough.
Much of the stored glycogen is converted into glucose.
The blood vessels leading from the muscles are constricted.
Bacteria that often live in their hosts where both partners cannot survive without the other are called
parasites
symbiosis
commensals.
saprophytes
In a plant tissue, water moved from cell A to cell B. This indicates that
cell A and cell B had the same osmotic potential.
cell A had a higher osmotic potential than cell B.
cell A had a lower osmotic potential than cell B.
cell A was older than cell B.
Which of the following are the end products of lactose?
Glucose and sucrose.
Glucose and galactose.
Glucose and fructose.
Fructose and galactose.
The graph below shows how the body temperature of a frog varies with that of air over a 24 hour period.
Which one of the following is correct about the temperature control in a frog?
The frog keeps its temperature constant irrespective of time of the day.
The frog’s body temperature increases as the air temperature increases.
The frog’s temperature is higher at 12 00 noon.
The difference in the body temperature of the frog and the surrounding is constant throughout.
A man of blood group A marries a woman of blood group B and produce a child of blood group AB. Which one of the following statements is true about his family
The mother could donate blood to the father bit not to the child.
The child could donate blood to the father and the mother.
The child could receive blood from the father and the mother.
No blood transfusions between members of the family are possible.
In which region of the mammalian vertebral column do the vertebrae have long neural spines and short transverse processes?
Sacrum
Lumbar
Thoraic
Neck
What happens when the ciliary muscles of a mammalian eye contract? The lens
thicker and eyes see far objects.
thinner and eyes see near objects.
thicker and eyes see near objects.
Thinner and eyes see far objects.
Which one of the following sets contains only characteristics of continuous variation?
Tongue rolling, blood groups, skin colour.
Height, body weight, intelligence.
Sex, haemophilia, height.
Finger prints, intelligence, albinism.
The following are sizes of different soil particles in millimeters.
P = 2.0 – 0.02 Q = 0.2 – 0.02 R = 0.02 – 0.002 S = less than 0.002
In which of the following soil particles would you expect the rise of water by capillarity to be highest
P
Q
R
S
Which one of the following methods can be used to estimate the population of butterflies in a flower garden?
Direct count.
Quadrant.
Line transect.
Capture – release recapture
Where in the mammalian skin is the melanin pigment found?
Malphigian layer.
Granular layer.
Cornified layer.
Subcutaneous layer.
Which one of the following organisms reproduce by budding?
Yeast
Amoeba
Siprogyra
Mucor
What would happen to a plant tissue placed in a strong sugar solution? It
becomes longer and soft.
maintains the original length and texture.
becomes shorter and soft.
becomes shorter and hard.
Figure 1 shows a leaf type.
Which type of leaf is shown in the figure above?
Compound bipinnate.
Compound trifoliate
Compound pinnate.
Compound palmate.
Which one of the following is not a function of blood?
Regulation of sugar level in the body.
Healing of damaged parts of the body.
Regulation of body temperature.
Transportation of wastes.
Figure 2 is a cross section of a part of a plant.
From which one of the following was the section obtained?
Root of dicotyledonous plant.
Stem of monocotyledonous plant.
Root of monocotyledonous plant.
Stem of dicotyledonous plant.
What effect does light have on the distribution of auxins at the tip of a plant shoot?
Causes equal distribution of auxins at the shoot tip.
Has no effect on the distribution of auxins at the shoot tip.
Concentrates more auxins on the dark side of the shoot tip.
Causes auxins to concentrate more on the illuminated side of the shoot tip.
Which one of the following is a modified root?
Irish potato tuber
Cassava tuber
Rhizome
Corm
Which one of the following organs is responsible for removing excess amino acids from blood?
Gall bladder
Kidney
Liver
Spleen
Which one of the following is the most common air pollutant?
Dust
Fungicides
Herbicides
Smoke
In which part of the kidney nephron does reabsorption of glucose occur?