Scientists and authors of science fiction have been thinking about what for a long time? A. human life on Mars
B. space exploration and colonization
C. the solar system and planets
D. No answer text provided.

Name the organs of humanelemintary canal.

Draw the structure of dna nucleotide with adenine as nitrogenous base

The hematodinium parasite becomes less of a problem for the blue crab when the crab is very young. fishing is thriving in the region. the crab moves to less salty water. a significant percentage of the population is impacted.