<h2>Answer is : 5.02/cm^3 </h2>
When it comes to temperature regulation we can classify animals into two different groups, the endotherms, and the ectotherms.
Most mammals and birds are endotherms, which means they can alter their body temperature through their metabolic processes and be independent of the external sources of heat.
On the other sides, many reptiles are ectotherms, which means that they have to rely on external sources of heat, such as the sunlight, to maintain their body temperature
Animals also can be classified into three different groups based on the type of their skeletons. Vertebrates possess an inner skeletal system called the endoskeleton, the arthropods possess external skeleton called the exoskeleton and many soft-bodied marine animals possess hydroskeletons, bodily support systems made out of fluid-filled coelom.
Answer:
Dissecting Microscope
Explanation:
The dissecting microscope is also called a stereomicroscope and is the most suitable for making a complete view of the bodies of the organisms shown in the question above. This is because this type of microscope has two objective lenses that capture light and provide a three-dimensional view to the observer, who will be able to fully observe and count the pollen grains in the body of each organism.
Answer: It is A
Explanation: C and D are jokes/ complete lies. B is wrong because Darwin did observe that animals and plants adapted (evolved) to suit their environments.
D) Increase in temperature.
When we are too hot, blood vessels supplying blood to the skin can swell or dilate (vasodilation). This allows more warm blood to flow near the surface of the skin, where the heat can be lost to the air.