Question

*Which of these is nitrogen-fixing bacteria?*

1️⃣ Nostoc
2️⃣ Anabaena
3️⃣ Azotobacter
4️⃣ All of these​

Answer 1

Answer:

all of these are nitrogen fixing bacteria

Answer 2

Answer:

4️⃣ All of these

Explanation:

Nostoc, Anabaena and Azotobacter are all nitrogen-fixing bacteria.