If mammals conserve body heat with keratin, then what do mammals use to conserve body heat? Answer choices: - four limbs - Energy. - energy - sarcasm - skin - keratin - sawdust - groceries
keratin

If breathing provides one substance transported by the blood, then what process provides one substance transported by the blood? Answer choices: - breathing - heat produced - drink - complex - osmosis - sweating - cell division - condensation
breathing

Q: If frogs have a three-chambered heart, then frogs have a _-chambered heart.? Answer choices: - alveoli - organ - ovaries - oxygen - edible - three - nektar - CO 2
A: three

Question: If weight lifting increases strength, then what does lifting weights increase? Answer choices: - intelligence - stamina - energy - sweating - timidness - Energy. - strength - fragility
Answer: strength

*Question*
If fossils can be formed when layers of sediment cover the remains of fish, then what can be formed when layers of sediment cover the remains of fish? Answer choices: - oysters - detritus - bones - deposits - fossils - metamorphic rocks - volcanic rock - shells
**Answer**
fossils

Q: If nitrogenous wastes are excreted in urine, then how are nitrogenous wastes excreted? Answer choices: - solutes - wetland - salmon - urine - soil - harmful - gills - CO 2
A: urine