Evolution means B. gradual development.
The answer is B. Medulla oblongata
The cardioregulatory/cardio vascular center of the brain is located in the medulla oblongata.
Answer:
The cells present in the stem are part of the xylem and phloem conductive tissues. They are characterized by being elongated and in tubular form because they transport the substances, the xylem transports water and inorganic mineral sales that the root absorbs from the soil. The phloem is responsible for transporting substances synthesized in photosynthesis.
Its tubular and elongated shape facilitates the transport of these substances
