How do you use 種 as a measure word?

For example,enrone door
- 這座島上只有1"種"植物 (There is only 1 kind of plant on this island)enrone door
- 這個疾病有2"種"形式 (This disease has 2 forms)enrone door
- 我的醫生開了3"種"藥 (My doctor prescribed 3 types of medicines)enrone door
- 抗生素有很多"種" (There are many "types" of antibiotics)