1st 9 Weeks Exam

Students in Mr. Carmona's class are getting ready to dissect a bullfrog. Which of the following should be used to ensure that everyone's hands are protected from the chemicals that the bullfrogs are preserved in?

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A student is examining some matter under a microscope. What question can the student answer that will best allow her to determine if the matter came from a living organism?

• Is the matter moist?

• Where was the matter found?

• Is the matter composed of cells?

• Does sunlight affect the matter?

Botanists are scientists that study plants. One group of botanists is learning to see how different environmental factors affect plant growth. They run four experiments which are illustrated in the picture. Which of the following best explains the differences in plant growth between the four plant experiments?

• hydrotropism

• phototropism

• gravitropism

• thigmotropism

Which of the following plant cells shows a plant that has a normal amount of turgor pressure in order to keep the plant upright and not flaccid?

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Which membrane bound organelle, found in both plant and animal cells, acts like the nervous system or brain of the cell which controls the cell's activities due to the genetic instructions it holds within?

• nucleus

• chloroplast

• golgi apparatus

• ribosome

Isabella is watering the plants for nature club. She accidentally knocks down one of Mrs. Delaune's potted plants. She goes inside the school and forgets to place it upright. One week later she returns outside and notices the plant growth. This response is most likely caused by which external environmental factor?

• gravity

• water pressure

• light

• atmospheric pressure

Which structure is found only in plant cells?

• cell wall

• cell membrane

• cytoplasm

• nucleus

In the mid-19th century, Louis Pasteur conducted an experiment that discovered the idea that organisms could come from nonliving materials. Which of the following ideas of cell theory did his findings support?

• All living things are composed of cells.

• Cells are the basic unit of life.

• All living cells come from pre-existing cells.

• All of the above.

Which of the following is an example of a plant responding by phototropism?

• The roots of a plant being pushed down by gravity.

• The stem of a plant held firmly upright due to turgor pressure.

• The tip of a carnivorous plant closing when an insect lands upon it.

• A sunflower moving throughout the day to face the sun.

Which cell organelle found in all cells is similar to the skin of the integumentary system which provides a barrier from the outside environment?

• cell wall

• cell membrane

• nucleus

• vacuole