Which is not an adaptation of desert animals that help them retain and acquire water in such a hot and dry environment? a.
burrow in moist soil or live in underground dens
b.
excrete uric acid instead of urine
c.
evolved an internal ‘air conditioning’ system to help them stay cool
d.
obtain water from the plants and animals they eat

the answer is d. chordata

before, trains worked using the steam engine. thus, it uses heat so it is crucial to apply heat balance. the steam engine absorbs energy during the stage of boiling water. so, this is the endothermic reaction. when the steam is used to work the piston, it has to release this energy through running the train. the excess energy is released as an exhaust to the chimney. this is the exothermic process because it releases energy to the surroundings.