This is because lizards are homeothermic animals, so their body temperature is dependent on the environment's temperature. The warmth provided by sunlight makes the lizards more active.

This is because lizards are not homeothermic animals, so their body temperature is dependent on the environment's temperature. The warmth provided by sunlight makes the lizards more active.

This is because lizards are endothermic animals and as a result their body temperature is dependent on the environment's temperature. The warmth provided by sunlight makes the lizards more active.

In tropical forests, there are so many tall tress that barely any rainwater reaches the ground, so to carry out photosynthesis, some plants (epiphytes) have to climb on the trunks of larger trees to collect rainwater.

In tropical forests, there are so many tall tress that it gets quite warm at ground level, so to carry out photosynthesis, some plants (epiphytes) have to climb on the trunks of larger trees to keep cool.

In tropical forests, there are so many tall tress that barely any sunlight reaches the ground, so to carry out photosynthesis, some plants (epiphytes) have to climb on the trunks of larger trees to receive sunlight.

At high altitudes, the concentration of oxygen is lower. As a result, the transportation of oxygen in the blood has to be more efficient. The increase in red blood cells increases the efficiency of oxygen transportation in an organism.

At high altitudes, the concentration of oxygen is lower. As a result, the organism consumes more energy and more red blood cells with more oxygen are needed.

At high altitudes, the concentration of oxygen is higher, so organisms produce more red blood cells.

No. The salt cancentration in the sea is too high for a freshwater fish. It will become dehydrated.

No. The temperature in the sea is higher than in a river, so the freshwater fish will die of heat.

Yes, all freshwater fish can adapt to live in an environment with a higher salt concentration.

Some turtles are dominant over others and they do not let them hibernate.

In tropical areas, there are no cold seasons in which food is scarce, so the turtles are active all year round and do not need to hibernate.

Because they are capable of maintaining their body temperature all year round, whether it is cold or warm.

Because hunting is a difficult activity that is not always successful.

Because food is always available, so it's a waste to use energy continuously hunting.

Because the prey they hunt gives them enough energy to use and store for a long period of time.