Answer:
Option (a).
Explanation:
Counter current flow may be defined as the flow of water in the opposite direction with the flow of blood in the body. This countercurrent flow is generally occurs in fishes.
The one main benefit of the countercurrent flow is the absorption of maximum oxygen as the water flows inside the body. Approximately, three time more oxygen is extracted during the counter current flow. The concentration gradient is maintained up to the whole length of gills.
Thus, the correct answer is option (a).
5. they both photosynthesize.
6. they had to be able to get water from their new environment and retain this water. They also had to adapt to reproduction on land (use of pollinators - this is co-evolution)
7. Because those animals are their pollinators.
B since there are two nuclear envelopes it is the last stage -- telophase
Answer: the answer is tuberculosis
Explanation:
