Program for International Student Assessment (PISA) REVIEW - SCIENCE

Which part of the comic strips shows improper handling of the microscope?

• The carrying of the microscope.
• The breaking the glass slide.
• Focusing using the coarse adjustment knob.
• Observing the specimen directly using the low power objective (LPO).

Which is most likely the cause of the breaking of the glass slide?

• Leaning heavily on the microscope.
• Carrying the microscope by its arm.
• Forgetting to turn off the light source.
• Using excessive force to adjust the focus.

Which of the following statements BEST describes metaphase?

• There is separation of sister chromatids.
• There is a crossing-over of chromosomes.
• The chromosomes move toward the opposite poles.
• The chromosomes align at the equatorial region of the cell.

Assuming the parent cell has 8 chromosomes, what is the chromosomal number for each resulting daughter cell?

• 4 chromosomes
• 8 chromosomes
• 12 chromosomes
• 16 chromosomes

What might happen if the cell's "strings" (spindle fibers) failed to pull the chromosomes apart correctly during anaphase?

• The cell will not be able to form a new nucleus.
• The cell will skip the stage and move to the next stage.
• The new cells might have an uneven number of chromosomes, which could cause problems.
• The cell will divide normally with both new cells having the same number of chromosomes.

Which of the following best describes a population?

• Population is made up of the same organism.
• Population is made up of different organisms.
• Population is made of the same community.
• Population is made up of the different communities.

Based on the diagram, which level of biological organization includes all of the other levels?

• Cell
• Biosphere
• Organism
• Ecosystem

Which of the following describes the BELOW illustration in terms of energy flow?

• The movement of energy is from primary consumer to secondary consumer, then tertiary consumer, and lastly producer.
• The movement of energy is from tertiary consumer to secondary consumer, then primary consumer, and lastly producer.
• The movement of energy is from secondary consumer to primary consumer, then to tertiary consumer, and lastly to producer.
• The movement of energy is from producer to primary consumer, then to the secondary consumer, and lastly to the tertiary consumer.

The farmer placed poison throughout his rice field to eliminate the primary consumer. How will it affect the population of the secondary consumer?

• It will consume the tertiary consumer as a source of food.
• It will decrease the population of the secondary consumer.
• It will increase the population of the secondary consumer.
• It will adapt with the situation by consuming the producer.

Eagles are the top predators in an ecosystem, which is most likely to happen if its population will rapidly reduce due to excessive hunting?

• There will be a sudden increase in the population of the snakes.
• There will be a sudden increase in the population of the rats.
• There will be less damage on the rice plants.
• There will be more damage on the rice plants.