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Paper 1 | Objectives | 60 Questions
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Paper 1 | Objectives
Amoeba obtains its oxygen requirements
A. from oxidising food substances
B. from air trapped in vacuoles
C. through diffusion of air into its body
D. through an air cavity in the ectoplasm
Which of the following best describes a colony of volvox?
A. Asexually reproduced cells held together in a mass, but independent of each other
B. Sexually reproduced cells held together in a mass, and dependent on each other
C. Single free-living acellular units irrespective of their parental origin
D. Several units of cells, held together by cytoplasmic strands and dependent on each other
The hydra has two body layers of cells called
A. ectodermis and enteron
B. ectodemt and endoderm
C. endodermis and dermis
D. epidermis and dermis
All the following organelles have membranes except
C. cell membrane
D. cell wall
Which of these has the most complex level of organization?
The unit contained in a cell structure responsible for changes in form and shape of organisms is called
The plant cell mostly stores food as
The presence of a large member of mitochondria in a cell indicates that
A. it has little cytoplasmic content
B. the cell is very active
C. the cell is dormant
D. the respiration is poor
Which of the following statements is incorrect about diffusion?
A. It involves degradation of soluble particles in solvents
B. it occurs mainly in gaseous and liquid media
C. No membrane is needed to effect the movement of molecules
D. Molecules move from region of lower concentration to that of higher concentration.
In which of the following organisms is ammonia excreted as a waste product?
The following are the functions of supporting tissues in plant except
Which of the following organisms has the largest surface area-to-volume ratio?
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