Using the following biomass data, determine which groups is most likely to represent the producers in an area. group a- 1.5 kg group b- 11 kg group c- 37 kg group d- 809 kg

Which type of transport is responsible for oxygen entering into blood cells? a. vesicle b.passive c. facilitated d.active b.passive

What organs comprise the respiratory system of a bird

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