What 2 methods did scientist use to arrive at the order in which these organisms appeared first, protists, bacteria, land plants, amphibians, and mammals

Why / how does dna become more compact

A protein sample has been treated differently before being loaded onto the gel for SDS-PAGE. The first aliquot of the sample is treated with SDS. The second aliquot of the sample is treated with SDS and a reducing agent.

The Krebs cycle will not take place if?

When atoms combine to form compounds, they gain, lose, or share

The nurse working in an internal medicine clinic receives four phone calls from clients with chronic pancreatitis. which client should the nurse contact first?

A scientist is conducting an experiment to test a hypothesis. If the data from the experiment does not support the hypothesis, the research is not a waste of time because - A no additional research needs to be conducted B the question was answered

Which of the following types of models is most likely to be used to predict earthquakes? a. idea model b. physical model computer model d. none of the above

What allows members of the same species to have different characteristics

Which of the following does Max represent to Feld in "The First Seven Years"? A. a chance to improve his own life B. a way to realize a dream C. an escape from a life of hard work D. a professional with solid values

Where is pyruvate made in the cell? A. Cell membrane B. Cytoplasm C. Nucleus D. Mitochondrion