Look at this picture of a trilobite. life in the ocean once involved these animals, but it no longer does. what is the likely reason that theese animals became extinct?

According to the big bang theory, after the "bang," the universe remained dark until about  300,000 yearsone billion yearsthree minutesthree billion years  later, when neutral atoms began to form.

In a cladogram, what occurs at a node? a derived trait appears. evolution is stopped. an ancestor dies. the cladogram ends. aa as s as ss what are the chances that their offspring will have sickle cell anemia? 0% 25% 50% 100%

What process creates gametes? a.fertilization b.mitosis c.meiosis