The diagram above is an illustration of sense organ in humans. Study it and answer questions 15 and 16.
The part that protects the organ is labelled
- A. I
- B. II
- C. III
- D. IV
The structures that contain grey matter and white matter are found in the
- A. reproductive system.
- B. nervous system.
- C. respiratory system.
- D. digestive system.
Filtrates in the Bowman’s capsule contain vitamins because
- A. they have low molecular weight.
- B. most of them are fat soluble.
- C. they cannot be reabsorbed into the blood.
- D. little amount is required by the blood.
Which of the following blood vessels carries oxygenated blood into the heart?
- A. Pulmonary artery
- B. Anterior vena cava
- C. Pulmonary vein
- D. Posterior vena cava
The lumbar vertebra differs from the thoracic vertebra because it possesses a
- A. longer neural spine.
- B. wider neural canal.
- C. thicker centrum.
- D. shorter transverse process.
If a germinating seed is attached horizontally to a revolving klinostat, what would be the effect on the seedling after three days? The
- A. plumule will curve vertically upward while the radicle will not show any curvature
- B. radicle will curve towards the ground while the plumule will not show any curvature.
- C. plumule and radicle will not show any curvature.
- D. plumule will curve vertically upwards while the radicle will curve towards the ground
The function of the root hair in plants is to
- A. absorb soil water by the process of osmosis.
- B. excrete water and mineral salts by simple diffusion.
- C. purify the soil for the plant.
- D. translocate manufactured food.
The bursting of a red blood cell placed in a hypotonic solution is called
- A. crenation
- B. haemolysis
- C. plasmolysis
- D. cytolysis
The structure in the cell that controls the movement of substances in and out of the cell is the
- A. cytoplasmic membrane
- B. nuclear membrane
- C. protoplasm
- D. endoplasm
Which of the following organisms consists of unicellular cells joined to form a filament?
- A. Amoeba
- B. Spirogyra
- C. Euglena
- D. Chlamydomonas
The illustrated organism is capable of reproducing by
- A. sexual means only
- B. asexual means only
- C. vegetative propagation only
- D. sexual and asexual means
The diagram above is an illustration of a reproductive process in an organism. Study it and answer ques tions 4 and 5.
The type of reproduction illustrated is
- A. budding
- B. binary fission
- C. grafting
- D. vegetative propagation
A plant with short, vertical underground stem is a
- A. bulb
- B. corm
- C. rhizome
- D. tuber
Species are groups of organisms that
- A. are of different origins and are always found together
- B. are of common origin but cannot interbreed freely
- C. have similar features and can interbreed freely
- D. resemble each other and occupy different niches
Which of the following organisms contains Chlorophyll in its cells?
- A. Caterpillar
- B. Paramecium
- C. Euglena
- D. Grasshopper
ai. What are sense organs?
ii. Name three sense organs that respond to the stimulus of chemicals
b. List three animals each that exhibit the following courtship behaviours
i.territoriality ii. pairing
ci. State one similarity between the eggs of toad and the eggs of birds.
ii. State three differences between the eggs of toads and the eggs of birds.
d. Complete the table below by listing four organisms involved in the nitrogen cycle and state one role each of the organisms.
| four organisms involved in nitrogen circle | one role of organism |
e. Complete the table below by naming two types of heterotrophic modes of nutrition in animals and give two examples each of the organisms that carry out the modes of nutrition.
|
Two modes of heterotrophic nutrition |
Two examples of organisms that carry out mode of nutrition |
a. Complete the following Punnett squares of a dihybrid cross between two rats. One has black fur (BB) and short tail (tt), the other has brown fur (bb) and long tail (TT).
| X | Bt | • | • | • |
| • | • | • | • | • |
| bT | • | • | • | • |
| • | • | • | • | • |
| • | • | • | • | • |
(b)i.How many of the offspring will have black fur and short tail?
ii. How many of the offspring will have brown fur and long tail?
iii. How many of the offspring will have black fur and long tail?
iv. How many of the offspring will have brown fur and short tail?
(c)
i.If there were twenty (20) chromosomes in the leaf cell of a plant, how many chromosomes would be in each of the following cells of the plant?pollen grain.
ii. If there were twenty (20) chromosomes in the leaf cell of a plant, how many chromosomes would be in each of the following cells of the plant? guard cell.
iii. If there were twenty (20) chromosomes in the leaf cell of a plant, how many chromosomes would be in each of the following cells of the plant? ovule.
iv. If there were twenty (20) chromosomes in the leaf cell of a plant, how many chromosomes would be in each of the following cells of the plant? root cell
a.Relationships I, II, III, IV and V exist among some organisms in an ecosystem. Use them to answer the question
I: Organism A grows on dead organism B.
II: Organism C feeds on the remnants of food left by organism D without affecting organism D negatively or positively
III: Organism E provides shelter for organism F while organism F transports organism E towards food
IV: Organism G kills organism B for food
V: Organism H feeds on organism J, causing organism J a disease.
Name the type of relationship in: I,II,III,IV,V
b. what is the biological term for each of organisms B and G?
c. Name one example each of organisms B to J
di. Name the relationship that is most beneficial to the ecosystem.
ii Give one reason for the answer in 3d(i)
ei. Give two examples of organism A
ii. Name the group to which organism A belongs
a.Complete the table below
| Element | Function in plants | Effect of deficiency in plants |
| Iron | ||
| Molybdenum | ||
| potassium | ||
| copper | ||
| nitrogen |
b.Name three classes of organic foods which are essential constituents in the diet of a mammal.
c.State two roles each of the following structures of the digestive system in humans:
i.buccal cavity ii, duodenum iii.stomach
d. Name the end product of adding dilute hydrochloric acid to sucrose
a.What is classification of living things?
b. State four ways each by which the following groups of organisms are of economic importance in their habitats:
i) fungi ii) plants.
c. complete the table below by stating five major phyla of the kingdom Animalia and give one example of each
| Phyla of kingdom Animalia | Example |