An igneous rock is found on the ground and has no identifiable crystals. What is the most likely origin of this rock? molten material that cooled slowly molten material that cooled quickly rock that was eroded by surrounding rocks rock that was exposed to extreme pressure

African penguins, which inhabit the coasts of southern africa, were classified as an endangered species in 2010. two significant threats to their survival are ecosystem damage from oil spills and overfishing by humans. overfishing depletes the food supply of african penguins. the best method to reduce the threat of overfishing would be to . the risk of oil spills could be reduced by increasing the use of , which should oil consumption. if an oil spill does occur, could be used to remove the oil so the ecosystem may more quickly recover.

If an organ has six haploid chromosomes,how many chromosomes are present. 6 12

Which of the following organisms are capable of self-fertilization? a.plants b.tigers c.humans