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One difference between prokaryotes and eukaryotes is that

Enxymes catalyze ractions by

The jellylike interior of the cell is called the:

An example of an evolutionary trend is: asymmetrical->radial->bilateral symmetry.

It is very easy for someone unfamiliar with mushroom species to tell the difference between poisonous and nonpoisonous mushrooms.

Which of the following pairs contains, first, an r-selected organism and, second, a K-selected organism?

The study of nutrient cycling though the environment is an example of which of the following?

A college professor notices that students who take lecture notes on their laptops tend to perform worse in her class compared to students to take notes by hand. She hypothesizes that the act of taking notes on a computer leads to reduced retention of information compared to taking notes by hand. To test her hypothesis, she recruits 50 undergraduates from her institution to take part in a study.  Participants are randomly assigned a note-taking strategy (either by hand or on a computer). They are led into an empty classroom and are instructed to take notes as they watch a 15-minute pre-recorded lecture. The following day, the participants are asked to return, and are given a quiz on the content of the lecture.   Which of the following is the independent variable in this experiment? [a1] Which of the following is the dependent variable in the experiment? [a2] What are the experimental units in this experiment? [a3] Which of the following potentially confounding variables is least important for the professor to hold constant? [a4] Which of the following ideas for increasing replication is most likely to improve the ability to test the hypothesis that taking notes by hand leads to better retention of information compared to taking notes on a computer? [a5]

In the image below, letter B is the ____________.

identify the largest depression at the distal end of this bone (no arrow needed)