The second step in the scientific method is to ask questions
Humans have 23 pairs of chromosomes
Echinoderms, they are among the most common invertebrate animals in the marine environment of virtually any part of the world, among them we can find species such as sea cucumber , salmon and cod fish, they have chamois cloth like outer layer, then we have the Crinoids, another example of marine species with feather, popularly they are called sea lilies and feathery stars, they have a solid calcite skeleton; they were so abundant in the paleozoic seas that their remains formed large limestone thicknesses.
I think it is the 3rd one because health problems at older age.
The part of the brain that distinguishes the human qualities that we have over animals is the frontal lobe. <span>It </span><span>is the part of the brain that controls important cognitive skills in humans, such as emotional expression, problem solving, memory, language, judgment, and sexual behavior. It is, in essence, the “control panel” of our personality and our ability to communicate.</span>
