Read the text.The octopus is one of the strangest creatures in the sea. For one thing, it has three hearts. One heart pumps blood to its organs, and the other two pump blood to its gills. Octopus blood itself is strange: while the blood of mammals is iron-based, an octopus's blood is copper-based. In chilly ocean depths, it turns out, copper distributes oxygen more efficiently than iron. In octopuses (yes, the plural "octopuses" is correct), the copper substance that binds to oxygen is called hemocyanin, and it makes octopus blood appear blue.The octopus is also highly intelligent—possibly the world's most intelligent invertebrate, in fact. (Invertebrates are animals that lack backbones.) Thanks to its large brain, an octopus can solve problems, dismantle things, and navigate mazes.Which author's purpose is suggested by the text?to inform readers about octopusesto convince readers that octopuses are strangeto inform readers about copper-based bloodSubmit

tentacle is to octopus as leg is to

Many octopus species live in shallow waters in coral reefs. They feed on worms, crabs, small fish, shrimp and shellfish. Identify the direct source of the energy that octopuses need to power their body functions. sunlightplantsother animalschemicals from minerals in the environmentI'm not sure

Many octopus species live in shallow waters in coral reefs. They feed on worms, crabs, small fish, shrimp and shellfish. Identify the direct source of the energy that octopuses need to power their body functions.

Blood in the left side of the heart contains    because it just came from the lungs. Oxygen-rich blood is a bright    color. Oxygen-poor blood is   red in color, It is a myth that deoxygenated blood appears   . Blood, is the fluid that our hearts pump through our    systems to deliver    and other materials to all the cells in our body. The average adult human has about    liters of blood and that fluid is made up of clearish liquid   , in the red and white blood cells and    that float within it. White blood cells fight off   , platelets help blood   , and the red blood cells carry oxygen. The blood from your papercut was    blood and was full of oxygen, while the stuff that the    tapped at the blood drive was venous blood that had just delivered its oxygen payload.Word Bank:oxygenphlebotomistlymphocytepinkoxygencapillaryplasmaplateletshematologistHemoglobintwofivecirculatorycarbonveinsformed elementsdarkinfectionarteriesredhemocyaninbluefour

An animal's markings are often very important for survival. Many birds use their bright markings to attract a mate, while leopards take advantage of their spots to hide in the grass while hunting. Other creatures, like the chameleon, can change colour to blend in with the environment when hiding from predators. The mimic octopus, though, has a unique trait — it can change not only its colour, but also its shape and behaviour to disguise itself as several different marine animals.First discovered in 1998 off the coast of Indonesia, the mimic octopus is now well-recognised around the world as a master of mimicry. Naturally brown in colour, it can change its appearance to resemble crabs, sea snakes, jellyfish and several different species of poisonous fish. Whenever a predator approaches, the octopus transforms itself to scare the predator away. For example, if a damsel fish comes near, the octopus buries its body in the sand leaving just two striped legs on show — the two legs resemble the head and tail of a banded sea snake which is known to eat damsel fish.Having such a wondrous talent has meant there has been a lot of interest in the octopus since it first came to public attention. Some scientists are worried that this may put the octopus at risk as divers try to catch them for aquariums and collectors.