We all have a common ancestor hence we have some form of a universal genetic code
Answer:
The answer is:
B. Worms consuming the blood from mammals.
Algae isn't causing any harm to the sloth, rather its providing it with camouflage to hide from predators. Both creatures benefits since the algae gets to eat any parasites and other things in the sloths fur, plus they get a free ride and home in the process. The sloth isn't harmed and is helped by the algae since it provides camouflage (mutualism).
Tree frogs aren't causing harm to the trees since they are only using them to hide from predators, the tree serves as protection for the frogs and aren't harmed in the process (commensalism).
Two fish protecting each other from predators aren't harming each other in any way, rather they are protecting each other from another animal that wants to eat them (mutualism).
The worms however are harming the mammals because they are consuming the mammals blood, this is parasitism since one animal is benefiting and the other is harmed.
Hope this helps! :)
Earth's surface wind generally blow from regions of higher AIR PRESSURE TOWARDS REGION OF LOWER AIR PRESSURE.
The direction in which the wind blow on the earth surface is a product of many factors, the most important of these factors are: pressure, friction and Coriolis effects. On the earth surface, the wind normally blow from high to low pressure. A high pressure system followed by a low pressure system allows the wind to flow in clockwise direction outward toward a low pressure system. This ensures the continuous flow of the wind.
The heart is a hollow cone shaped muscular pump within the thoracic cavity
Answer:
They have homologous structures because they have a common ancestor.