What sugar is found in the nucleotide of deoxyribonucleic acid?

From which of the following layers of the sun is light energy radiated into space? Convective zone Inner core Photosphere Radiative zone

Compare valleys and plains

Where does the energy lost betwen levels go? (Ecological pyramid)

How does too much nitrogen and phosphates harm the environment?

We produce many more synapses than we need, and then retain only those that are used in a "use it or lose it" fashion. what does this demonstrate?

What is the function of heart valves? They return blood to the heart. They force blood to flow out of the heart. They regulate the heart rhythm. They prevent blood from flowing backwards.

Scientists use different types of models to analyze the structure of ecosystems. Which characteristic is seen in a biomass pyramid

What field is used to classify organisms

Which best describes how the fossil record supports the theory of evolution? a. The fossil record shows exactly how all species have evolved. b. The fossil record refutes Darwin's theories. c. The fossil record cannot accurately be aged. d.

Which type of diagram illustrates the flow of energy through a group of particular species? A. food web B. food chain C. energy plate D. energy pyramid