Answer:the gizzard
Explanation:I know a lot about birds
<span>The correct answer is d. increase the rate of breathing.</span>
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Peripheral chemoreceptors (the carotid and aortic bodies) can sense hypercapnia (high CO2) and then they send a signal to the breathing centre. Breathing centre is in medulla oblongata which regulates breathing movements. When CO2 reaches a certain level, a signal is sent to trigger an inhalation and the rate of breathing is increased.</span>
There is a difference between the stem of these two plants because Ranunculus is dicot and Zea mays is a monocot. <span>Zea mays does not have a vascular cambium and has scattered vascular bundles composed of xylem and phloem tissue. On the other hand, Ranunculus has its vascular bundles in a ring arrangement and ground tissue is differentiated hypodermis, cortex, endodermis, pericycle and pith (there is no differentiation in Zea mays).</span>
Answer:
!! neither mechanical nor chemical digestion
