Chapter 1 practical bio exam semester 2 review

Biology is the study of ....

• minerals

• life

• the weather

What is the general process scientists use to gather information and answer questions?

• a theory

• gel electrophoresis

• the scientific method

A scientist testing the effects of a chemical on apple yield sprays and orchard with the chemical. A second orchard does not receive the chemical. In the fall, the number of apples harvested from each orchard is counted. Which of the following is the independent variable in the experiment?

• The chemical

• the number of apples

• the first orchard

Based on the question prior about the orchards, which of the following is the dependent variable in the experiment ?

• the chemical

• the number of apples

• the first orchard

The orchard sprayed with the chemical yields an average of 60 apples per tree, the other orchard yields an average of 40 apples per tree. Based on the data, the scientist would:

• test the chemical on other plants

• determine the results were inconclusive

• determine that the chemical increases apple yield

In order for apple tree experiment to be valid scientifically, both orchards must:

• receive the same amount of sunlight

• receive the same amount of water

• all of these must happen

The smallest unit capable of carrying out life functions is:

• a cell

• tissue

• DNA

A newly discovered microscope structure is hypothesized to be a living organism. Which of the following characteristics would support the idea that this "organism" is alive?

• it maintains a constant internal environment

• it absorbs energy

• all the above

Which of the following characteristics are shared by all organisms ?

• all organisms are composed of two cells

• all organisms can smell and taste

• all organisms have cells that contain DNA

Many types of trees in our area lose their leaves in the winter in order to avoid freezing. What is this an example of ?

• organization

• response to stimuli

• species