The first option for 1 and the second option for 2
Answer: I'd say C
Explanation: Small plants are at the bottom of the ecosystem, which means they have to start it out. I'm not sure tho.
C) Lactic acid and energy
This is the reason we feel a burning sensation during strenuous exercise.
The epiglottis. It prevents food from entering the respiratory tract
Answer:
It shows the three organisms to have evolved from a common ancestor.
Explanation:
An identical sequence of amino acids for cytochrome c in cows, pigs and sheep show that they most likely evolved from a common ancestor. The common ancestor might have evolved over time and in result, three different species were produced. It also shows that they are more closely related to one another than other organisms.
Other properties or traits that are common in these organisms are :
They all are mammals.
They are all livestock animals.
They all are multicellular organisms.