Nitrogen-fixing bacteria in root nodules fix nitrogen in soil air into:
Correct answer: A. Ammonia
- A. Ammonia
- B. Nitrite
- C. Nitrate
- D. Amino acid
Explanation
The symbiotic nitrogen-fixing bacteria invade the root hairs of host plants, where they convert free nitrogen to ammonia, which the host plant utilizes for its development. However, according to Punjab text book, it is C i.e. 'Nitrates'.
Last updated
About Digestion
The human digestive system covers the organs from mouth to anus, the movement of food, and the mechanical and chemical breakdown of carbohydrates, proteins and fats. It also includes the roles of digestive enzymes, bile, absorption through intestinal villi, and the assimilation of nutrients by body cells.
Practise Digestion
680 free Digestion MCQs from Biology, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Exams that ask Biology questions like this
Biology is on 6 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
Related questions
Amylase is not produced by the following type(s) of salivary gland:
Which of the following animals can survive without drinking water?
Digestion of which food components starts from the oral cavity?
Which of the following nutrients is incorrectly paired with its function in a plant?
In human gut, chylomicrons are formed by the combination of: