Answer:
In a comparison of birds and mammals, the condition of having four limbs is a shared ancestral character
A food chain can usually sustain no more than six energy transfers before all the energy is used up. And so less energy is transferred at each level of the food chain so the biomass gets smaller.
Think about skin cells. Skin cells shed every day, if cell division didn't take place, you would just constantly be losing skin cells.
Answer:
Figure 19.2. The Light Reactions of Photosynthesis. Light is absorbed and the energy is used to drive electrons from water to generate NADPH and to drive protons across a membrane. These protons return through ATP synthase to make ATP.
Explanation:
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