School Improvement in Maryland

This Week’s HSA Item

HSA Items of the week can be used in a variety of ways by teachers, students, parents, tutors and other interested parties. They may be used as warm-up activity at the beginning of the class or as a review at the end of instruction. Students and parents can use them as an ongoing review to ensure that students have mastered and retained the content they are expected to learn.

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Use your mouse to select a grade from the subject categories below. This week’s HSA Item for that category will appear at right.

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Student Handout with Answer Key, and Objective Information.

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Monitoring Reports

Students can keep a record of their progress on these assessment items by using the Monitoring Report, a tool that lists of of the grade level objectives assessed on HSA. The Monitoring Report contains space for entering multiple assessment results and diagnostic comments.

Monitoring Report for Biology

HSA Item of the Week

This item is one of the many resources available in the Science CLG Toolkit.

Biology

Use the information and the diagram below to answer the following item.

The diagram below shows stages of cell division of an amoeba, a unicellular organism.

Scientists have found that the rate of division in amoebas is controlled. Scientists believe that the transition from stage 2 to stage 3 is slowed by proteins. The additional time seems to help the amoeba change coding errors caused during DNA replication.

Which of these is most likely to be found in amoebas that do not have a sufficient delay between stage 2 and stage 3?

  1. mutations
  2. competition
  3. pH imbalances
  4. selection pressures

View answer and objective assessed

/toolkit/clg/public_release/science/2009_334_bio06.xml