5. If human dental formula is 2-1-2-3/2-1-2-3. What does the 1 stand for? A. Molar
C. Incisor
B. Canine
D. Premolar​

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answer; the male's sperm cells have mitochondria, but because the sperm contributes dna but no cytoplasm, no mitochondria are passed to the egg at ferilization;

producers within ecosystems are essential as they are at the base of the food chain. plants are examples of producers. they use the process of photosynthesis to capture light energy and use it to convert simple inorganic substances (carbon dioxide and water) into organic substances (glucose).