The following cases belong to polymorphosis（ ）.
A: In the same season, there are two types of viviparous female aphids: wingless and winged.
B: Long wing and short wing of brown planthopper
C: Workers and soldiers in ant population.
D: Females and males of stag beetles
A: In the same season, there are two types of viviparous female aphids: wingless and winged.
B: Long wing and short wing of brown planthopper
C: Workers and soldiers in ant population.
D: Females and males of stag beetles
举一反三
- The saying “men are from Mars and women are from Venus” correctly denotes that _________. A: males and females are different. B: males and females are similar. C: males and females are the same. D: males and females do not come from the Earth.
- 词汇与结构 We do this to help overcome the ______, as the left wing, the windward wing, will generate more lift than the leeward wing due to the fact that the leeward wing is partially blanked out by the fuselage.
- In U.S.A., there are two different types of cases: criminal cases and civil cases.
- A new wing was _________to the building.
- Which of the following works belongs to William Wordsworth? A: Ode to the West Wing B: Don Juan C: Daffodils D: Ode to a Nightingal