Which of the following groups of animals do not possess a nervous system?
- A. Porifera
- B. Cnidaria
- C. Platyheminthes
- D. Nematoda
Correct Option: Answer is A
Sponges, the members of the phylum Porifera, are a basal Metazoa clade as a sister of the Diploblasts. They are multicellular organisms that have bodies full of pores and channels allowing water to circulate through them, consisting of jelly-like mesohyl sandwiched between two thin layers of cells
2. The structural similarities in Paramecium and Euglena are in the
- A. shape of locomotory organs
- B. blunt anterior and pointed posterior
- C. presence of micro and mega nuclei in both
- D. presence of anterior and posterior contractile vacuoles
Correct Option: Answer is B
3. Which of the following organisms cannot exist freely on its own?
- A. Chlamydomonas
- B. Amoeba
- C. Paramecium
- D. Plasmodium
Correct Option: Answer is D
Plasmodium is a genus of unicellular eukaryotes that are obligate parasites of vertebrates and insects. The life cycles of Plasmodium species involve development in a blood-feeding insect host which then injects parasites into a vertebrate host during a blood meal.
4. Which of the following cell organelles is the site for the production of ATP?
- A. Lysosome
- B. Nucleus
- C. Mitochondrion
- D. Ribosome
Correct Option: Answer is C
The production of ATP happens in the mitochondrion, which likewise exists in both animals and plants.
5. An example of osmosis in plants is the
- A. movement of water through the xylem
- B. loss of water vapour from the stomata
- C. translocation of food through the phloem
- D. absorption of water from the soil by the root
Correct Option: Answer is D
Plant roots function as a semipermeable membrane, allowing water to infiltrate the roots. The inside of the root contains minerals, sugars and salts dissolved in water; when water is available in the surrounding soil, osmosis causes it to flow through the root wall to its interior.
6. The organism that can carry out both autotropic and heterotrophic modes of nutritions is
- A. Chlamydomonas
- B. Eudorina
- C. Euglena
- D. Spirogyra
Correct Option: Answer is C
Euglena use their chloroplasts to produce nutrients through photosynthesis. It is a dual organism as it can act both as an autotroph, making its own food, and heterotroph, feeding on other substance
7.
The diagram above illustrates a part of the human skeleton. It represents the bones of the
- A. upper arm
- B. lower arm
- C. upper leg
- D. lower leg
Correct Option: Answer is B
The diagram shows the lower arm which can be seen between the elbow and the wrist.
8.
Which of the labelled parts of the diagram of the part of the human skeleton articulates with the head of the trochlea to form a hinge joint?
- A. I
- B. II
- C. III
- D. IV
Correct Option: Answer is B
The part II is attached to the humerus. It forms a hinge joint to make up the hand.
9.
The diagram above illustrates a part of the human skeleton. The labelled part that provides surface for the attachment of the triceps is
- A. I
- B. II
- C. III
- D. IV
Correct Option: Answer is C
The triceps is a large muscle on the back of the upper limb of many vertebrates. The part III is a part of the bone that forms the triceps.
10
The diagram above illustrates the transverse section of a
- A. dicotyledonous root
- B. monocotyledonous root
- C. dicotyledonous stem
- D. monocotyledonous stem