Does a forest in northern Canada have greater biodiversity than a tropical rain forest

What is the chance of two parents with blood types ab and o producing an offspring with blood type o a.0% b.25% c.75% d.50%

Why does the alligator have one of the strongest bite force and why does it run so fast i need to know i live in florida

Each pair of clay balls represents two planetesimals. if each planetesimal is composed of the same material and is separated he the same distance, which pair experiences the frayed gravitational attraction?