An organism is excreting ions in its urine. What is likely the current tonicity of the organism's cells, and why?
1.hypotonicity due to too much solute in its body fluids
2. hypertonicity due to less solute in its body fluids
3. hypertonicity due to too much solute in its body fluids
4. hypotonicity due to less solute in its body fluids

Which set of characteristics best describes sedimentary rock? a) largest type of rock, made of organic matter, hardest type of rock b) often contains layers, forms near sources of water, contains fossils c) least abundant type of rock, made of other rocks, made mostly of minerals d) most abundant type in earth's crust, made of magma/lava, contains no fossils

The breakdown of food is accomplished by enzymes. a. physical b. chemical c. mechanical d. none of the above

Freckles are a dominant trait in humans. both of the girls have the genotype ff for freckles. if either one marries a man with no freckles, what are the chances that their children will have freckles?