To protect against introduced species, some states have laws preventing oceangoing ships from dumping ballast water in harbors or posts. what does this indicate about introduced species? many are fish that live in salty ocean water many are native to freshwater harbors many are transported in ballast water many can live a long time without food

Models are non-visual ways of coummincating how someone thinks about something in the natural world

Astudent reads the following text in a science book: scientific evidence tells us that the cause of earths four seasons is the tilt of earth as it revolves around the sound the student is instructed to illustrate this information in a science book. how will the student illustrate winter in the northern hemisphere? a.earths northern hemisphere will tilt away from the sun. b. earths northern hemisphere will tilt toward the sun. c.earths orbit will be farther away than from the sun d. earths southern hemisphere will tilt away from the sun.

20. in humans, freckles are dominant to no freckles. trey has no freckles and his wife anna grace has freckles, but her dad doesn't. they want to know what percentage of their kids would look like trey. show a punnett square to support your answer.