Explain the significance of oxygen to animals? A. Animals use oxygen to help circulate blood in the body.
B. Animals use oxygen to digest food.
C. Animals use oxygen to convert food to energy through photosynthesis.
D. Animals use oxygen to convert food to energy through respiration.
please answer asap its for a test

During the process of meiosis, special cells called gametes are formed. gametes only have half the number of chromosomes that the other cells in the body have. what form of reproduction do organisms that produce gametes use?

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4the indian leaf butterfly has traits that allow it to resemble a leaf. the bright colors of the monarch butterfly indicate that the butterfly tastes bad and can be poisonous. how does the appearance of these butterflies them to survive? f the indian leaf butterfly is able to avoid predators while the monarch butterfly warns predators away. g. the indian leaf butterfly frightens predators away while the monarch butterfly poisons predators before they can eat it. h both butterflies rely on camouflage to avoid predation. j both butterflies cooperate with one another to avoid predation.