IB myp 4-5 Biology – Practice Questions- All Topics
Topic :Process-Word and Chemical Equation
Topic :Process– Weightage : 21 %
All Questions for Topic : Photosynthesis; transport in plants; xylem; phloem; transpiration and translocation; roots; tropisms; monocots and dicots; structure of leaf and stem; rate of transpiration and factors affecting it;Cell Respiration;Aerobic and Anaerobic;Word and Chemical Equation
Analysis and evaluation
Question:
a) Present the results of your experiment to measure the energy content of oils in a clear and detailed results table. Remember to include row and column headings and SI units for quantitative variables.
▶️Answer/Explanation
Ans: Columns with headings on table; rows with headings on table; table shows temperature before and after and preferably also temperature rise.
b) Display the results using a suitable type of graph or chart.
▶️Answer/Explanation
Ans: Bar chart; temperature rises shown with bars; y axis with temperature scale and appropriate legend.
c) Use calculations to evaluate the energy yields per hectare of palm oil and the other crop that you have investigated.
▶️Answer/Explanation
Ans: Energy yield per hectare = average yield (kg ha–1 year–1) × energy yield per kilogram (J kg–1); correct calculations; palm oil yield per hectare is higher.
d) Suggest scientific reasons for the differences in energy yield between the crops.
▶️Answer/Explanation
Ans: More photosynthesis in palm oil crop; higher temperature so more photosynthesis; higher light intensity so more photosynthesis; higher proportion of energy from photosynthesis stored in oil by oil palms than by other crops