新课标人教版课件系列高中英语选修( 模块）9-4.4 How much do you know about plants?Warming up Do you know that? 1. some plants do not have flowers? For example pine trees, cypress trees, ferns, mushrooms. With these plants, the seeds are not contained inside a fruit. Flowering plants have seeds that are contained inside fruit. 2. some plants have roots that live in the air? For example, mangrove trees live in wet conditions and have roots that grow up from the mud into the air to absorb oxygen (See Picture A, the man
