What do your muscles need during exercise that blood brings? what waste product (produced during aerobic respiration) does the blood carry away?

Hybrid instruments that play sounds that are part sampled and part synthesized are known as:

How do you know that the plant cells in these two images have different jobs, or functions? a. because all plant cells serve different functions b. because they are two different colors c. because their dna are different d. because their structures are different

Is becoming less expensive to screen blood samples for dna certain diseases have genetic basis what is possible ethical concern about the availability of inexpensive dna testing