Do You Know Your Kid's IQ?

Blood is red in color due to the presence of red blood cells. These cells contain a protein called hemoglobin, which carries oxygen throughout the body. When hemoglobin binds to oxygen, it gives blood its bright red color. Additionally, the red color of blood is also influenced by the presence of other pigments and chemicals in the blood.

Spiders have eight legs. Unlike insects, which have six legs, spiders belong to the class of arachnids, which typically have eight legs. This adaptation allows spiders to move efficiently and navigate their complex webs. Each leg is equipped with sensory organs, enabling spiders to detect vibrations and chemicals in their environment. With their eight legs, spiders can crawl, climb, and capture prey effectively.

A dozen is a term used to represent a quantity of 12 items. Therefore, the correct answer is 12.

The Black Ocean does not exist. There are five recognized oceans on Earth: the Atlantic Ocean, the Indian Ocean, the Pacific Ocean, the Southern Ocean, and the Arctic Ocean. The Black Ocean is not one of them.

The given expression follows the order of operations, which states that multiplication should be performed before addition. Therefore, we first multiply 3 by -4, resulting in -12. Then, we add 2 to -12, giving us -10. Hence, the correct answer is -10.

The given equation is 4x + 4 = 12. To solve for x, we need to isolate the variable. We can do this by subtracting 4 from both sides of the equation. This gives us 4x = 8. To solve for x, we divide both sides of the equation by 4. This gives us x = 2. Therefore, the correct answer is 2.

A group of lions is called a pride. This term is used to describe a social unit consisting of multiple adult females, their offspring, and a few adult males. The pride is led by a dominant male lion known as the "king" or "pride leader." The term "pride" is derived from the behavior and characteristics of lions within this social structure, where they exhibit a strong sense of unity, cooperation, and territorial defense.

The area of a triangle is calculated by multiplying the base by the height and dividing the result by 2. In this case, the base is 3 and the height is 2. So, the area of the triangle would be (3 * 2) / 2 = 3.

Whales are mammals because they have characteristics that define mammals. They give live birth, nurse their young with milk, have hair or fur, and breathe air using lungs. Unlike snakes and birds, which are reptiles and birds respectively, and monkeys, which are primates, whales belong to the mammal group.

To solve this equation, we follow the order of operations, which states that we should perform multiplication and division before addition and subtraction. Therefore, we first multiply 1 by 2, resulting in 2. Then, we add 5 to 2, giving us the final answer of 7.