For each statement, choose whether it describes a protein or a nucleic acid.
The subunits of
contain a base, a five-carbon sugar, and a phosphate group.
The subunits of
are amino acids.
Some of the subunits of
"must come from food.
DNA and RNA are

Organisms within a population must compete for resources to survive

Asap timed! 1. ice core samples from glaciers ice caps contain bubbles of ancient atmosphere that are in layers based on age. what questions are scientists most interested in? a. how the amount of water vapor needed to make the ice has changed b. how the amount of ozone has changed over time.c. how the amount of ice in each layer has changed over time d. how the amount of carbon dioxide has changed over time 2. what produces milankovich cycles ? a. sunspots ams solar flare on the suns surface b. changes in the earths orbit c. gravitational changes bases on the position of the sun and the moond. cycles of vegetation that result in desert and rainforest conditions

Which part of cellular respiration must occur before any of the other steps can occur