<em>Tiktaalik and Acanthostega are early tetrapods that do not have features unique to fish.</em>
<span>In such conditions, oxygen was available in abundance.</span>
Glucose!!
The primary role of carbohydrates is to supply energy to all cells in the body. Many cells prefer glucose as a source of energy versus other compounds like fatty acids.
Answer:
Explanation:
D nitrogen-fixing bacteria in root of legumes this is an illustration of a relationship that both organisms need