Trophic Levels. The first trophic level contains the greatest number of organisms and is comprised mainly of plants. The organisms in this layer are called primary producers because they get their energy from an abiotic source. Most primary producers get their energy directly from the sun.
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60-Second Answer. You can usually respond to an interview question in 60 seconds or less. If the interviewer wants you to expound on your answer, he can ask a follow-up question or ask you to proceed with more details. Answers that are 60 seconds or less involve the interviewer because you don't have time to dominate the conversation; he must respond to your comments or ask new questions.