Tập tính của động vật là

Which of the organisms listed below performs nitrogen fixation? a. legumes b. plants c. bacteria d. fungi

What kind of bond is created by the attraction between atomic particles of opposite charge? ionic bond hydrogen bond covalent bond nuclear bond

How do you know that the plant cells in these two images have different jobs, or functions? a. because all plant cells serve different functions b. because they are two different colors c. because their dna are different d. because their structures are different