The cardiovascular system I think. Hope this helps
In evolutionary theory, adaptation is the biological mechanism by which organisms adjust to new environments
The species likely living in an ecosystem on the other side of the mountain farthest from the coast is the cactus.
- Cacti are evergreen plants. Their stems might be meaty or succulent, cylindrical or flattened.
- The stems are green in colour and photosynthetic, usually fulfilling this job instead of leaves, which are scarce or nonexistent in most adult cacti.
Most cactus species are well-defended by spiky bristles and spines that repel most animals.
- Cacti are xerophytic plants, which means they are physiologically and morphologically suited to the high water shortages of dry ecosystems like deserts.
- Cacti's xerophytic adaptations include (1) succulent, water-retaining stems, (2) a thick, waxy cuticle, and few or no leaves to decrease water losses through transpiration.
Learn more about cactus here,
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Answer: D. The Krebs cycle
Explanation:
If oxygen is available, glycolysis is followed by two processes in the mitochondria -- the Krebs cycle and oxidative phosphorylation, respectively -- that further increase ATP yield.