The larvae (caterpillars) of a species of insect that feed on leaves of a tree were used in this investigation. The larvae were fed for 30 days on either green leaves or yellow leaves. The bar-diagram below shows the mean mass of the larvae, after feeding them for 30 days.


Study the above chart and choose the CORRECT statement(s).

• Correct answer
  A

  Female larvae, on an average, have higher mass than male larvae.
• Correct answer
  B

  Yellow leaves may have some chemicals that contribute to the differential increase in mass between male and female larvae after feeding.
• Correct answer
  C

  The increase in the mean mass of the larvae is governed by more than one factor.
• D

  The proportionate increase after feeding, the mean mass in female larvae is always more, compared to that of males.

Hence, the correct answer is options: 'A', 'B', 'C'.