Freshwater bony fishes continually produce a large volume of ______urine to counteract the effects of osmosis.
Fill in the blank(s) with the appropriate word(s).
dilute
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Answer the following statements true (T) or false (F)
1. Sweat has a higher salt concentration than the blood does in humans. 2. Animals that do not control internal water concentration also typically do not control the concentrations of ions like sodium and potassium. 3. An animal that exhibits broad tolerance for changes in the salinity of its environment is said to be "euryhaline." 4. The materials in urine are ONLY those that are filtered from the blood or hemolymph and not reabsorbed by the body following filtration.
Which of the following is likely to be true, based on the following cladogram?
1.Amphibians and lungfishes are sister groups.
2.Amphibians and amniotes both have four limbs and a swim bladder or lungs.
3.Amphibians and lungfishes both have four limbs and a swim bladder or lungs.
4.All of the groups listed have a backbone and a skull.
Most gymnosperms are pollinated by wind, whereas most angiosperms are pollinated by ________
Fill in the blank(s) with correct word
The sliding-filament model of muscle contraction is described by the action of ____ pulling ____ inward
a. muscle fibers; actin filaments b. myofilaments; sarcomeres c. sarcomeres; Z lines d. actin filaments; myosin filaments e. myosin filaments; actin filaments