<em>Both the Acanthostega and the Icythyostega were animals characterized by having four extremities and be equipped with gills and lungs at the same time, which determines that they are called tetrapods similar to fish.
</em>
<em>
</em>
<em>Their characteristics made them suitable for living in aquatic and terrestrial environments, so they probably inhabited shallow waters or even the surface of the earth.</em>
Answer:
The Loop of Henle serves to create a concentration gradient throughout the nephron which helps increase the reabsorption of water and certain ions. In the thin descending limb, water is very permeable and is reabsorbed due to the existing concentration gradient in the medulla.
Answer:
B) The rabbits with medium length legs are the most stable and thus will out survive the others.
D) It is unlikely that evolution is occurring because none of the traits have disappeared from the population.
Explanation:
The graph shows that rabbits with longer legs are more likely to have a selective advantage that allows them to survive and reproduce than shorter legs. Throughout the generations, it shows that the number of short legs have decreased, and the number of medium length legs neither have advantage or disadvantage.
The carpals belong to appendicular skeletal system
