kaylahcarter99 kaylahcarter99 08-01-2020 English contestada In which sentence is the underlined phrase an adjective clause? 1. The platypus, **which is a mammal**, has a bill like a duck and feet like an otter. 2. **When explorers first sketched the platypus,** scientists thought the sketches were a hoax. 3. A male platypus can eject venom **when another animal disturbs it.**