The number of different species living in a given area describes a habitat. a population. species diversity. genetic diversity.

In dna, only the_ varies from one nucleotide to another. base phosphate sugar amino acid

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.

What type of weather does tropical continental air bring in summer? hot and cloudy cool and sunny hot and sunny cool and cloudy