Some investigators concluded that the first organisms consisted of rna rather than dna. what is importance of this "rna world" period?

A rock formation near Gainesville, Florida, was formed 530 million years 1 ago. Which information does a scientist need to most accurately determine the age of a rock?

List the three common structures of a protist, animal, and plant cell

Why is this surprising: all matter in the universe can be made with just three ingredients: protons, electrons, and neutrons.

Which is true of Saturn's satellite, Titan? O A. It is the smallest of Saturn's satellites. O B. Its surface temperature is comparable to the surface of Earth. O C. It used to be classified as a planet. O D. Its atmosphere contains nitrogen. Apex

What researcher developed the theory of use or disuse, also called the theory of acquired characteristics

In humans how many chromosomes are in a cell

Explain why anatomists describe the adductor magnus as a muscle composed of two parts g

Describe three ways in which the organs of the circulatory system and respiratory system are protected.

A reef results from life processes. True False

Why do producers make up the base of the energy pyramid