The discovery that chromosomes are involved in inheritance was made possible by the invention of the what?

1. key concept list themajor biomes, and give onecharacteristic feature of each.

Which of the following statements is true? 1. the mantle of the earth is made of solid nickel and iron. 2. the crust of the earth is made of solid nickel and iron. 3. the inner core is made of solid nickel and iron.

Why do bacteria thrive even in hostile environments