Decide whether each statement about urine formation is true or false.
the liver changes toxic substances into less toxic substances that then travel to the
kidneys.
true
the kidneys filter blood and produce urine.
urine is made from the nutrients that are reabsorbed back into the blood from the tubules.
the kidney is the functional unit of the nephron.
urine is produced in the nephrons of the kidneys.
urine that is produced in the kidneys flows down the urethra to the bladder for storage and
then is excreted through the ureters.

Over the past 60 years, many amphibian species have experienced significant population declines and some species have become extinct. scientists suspected that local human activities such as the destruction of wetlands, regional pollution, and deforestation were the main reasons for these losses. however, research over the past 20 years reveals significant amphibian population declines in protected areas of the world, such as nature preserves and parks. these global declines suggest widespread problems including increased ultraviolet radiation, acid rain, and disease. in switzerland, for example, 14 of the 20 native amphibian species are threatened with extinction. chytridiomycosis is a fungal disease first identified in 1998 as a cause of massive amphibian deaths. in some severely impacted populations, a few individuals have survived, perhaps because of some natural resistance. if these resistant individuals continue to survive and prosper, new resistant populations might emerge. this would be an example of the founder effect artificial selection genetic drift natural selection sexual selection

What type of competition exsist between two species. turtles and fish

What conclusion can be made based on the temperature of soil when the light hits the soil at 0°, 45°, and 90° angles in section 2 of the experiment? did your results support your hypothesis? why or why not?