Will weather changes (drought/flooding) over time cause changes in the beak depth of a bird population?

Which of the following do all living things have in common

Achange in which factor will affect the rate of reaction only when gases are involved? temperature pressure surface area concentration

Which statements explains what the fossil records indicates? check all that apply. a) earth is 4.5 billion years old b) many organisms have become extinct c) mammals have always existed on earth d) mass extinctions have occurred several times on earth e) the amount of water on earth has decreased over time?