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What organelle is only associated with plant cells?

A. Cell wall

B. Ribosome

C. Cytoplasm

D. Golgi apparatus

Answer Explanation:

Only plant cells have cell walls, which help protect the cell and provide structural support.  The cell wall also enforces the overall structural integrity of the plant cell, and it is found outside the cell membrane. The next organelle is a chloroplast. It is found in the cytoplasm of only plant cells. Chloroplasts are photosynthetic compounds used to make food for plant cells by harnessing energy from the sun. These organelles play a role in photosynthesis.

Therefore, the Correct Answer is A.

More Questions on TEAS 7 Science

  • Q #1: If a person smells something sweet, what form of information is this initially perceived as in the nervous system?

    A. Cognitive

    B. Integrative

    C. Motor

    D. Sensory

    Answer Explanation

    A sensory nerve is a nerve that carries sensory signals from the external environment to the brain to the central nervous system. It is also an afferent nerve, long dendrites of sensory neurons, which sends sensory information towards the central nervous system (CNS). This information is what is sensed, using the five senses from external environment, sight, sound, smell, taste, and touch.

    Motor nerves have only efferent fibers, long axons of motor neurons, that carry impulses away from the CNS to the effectors, which are typically tissues and muscles of the body.

    Interneurons are nerve cells that act as a bridge between motor and sensory neurons in the CNS. These neurons help form neural circuits, which helps neurons communicate with each other.

  • Q #2: What phase is the cell cycle part of?

    A. Interphase

    B. Metaphase

    C. Prophase

    D. Telophase

    Answer Explanation

    Before mitosis or meiosis occurs, interphase must happen. This is when the cell cycle takes place. The cell cycle is an organized process divided into two phases: interphase and the M (mitotic) phase. During interphase, the cell grows and copies its DNA. After the cell reaches the M phase, division of the two new cells can occur. The G1, S, and G2 phases make up interphase. 

  • Q #3: Which example is part of the scientific method?

    A. A student reads about a new way to harness energy from the sun.

    B. A researcher studies the effects of car exhaust on how people breathe.

    C. A researcher analyzes how many plants respond well to a new fertilizer

    D. A student discovers how insulin plays a role in the development of diabetes

    Answer Explanation

    One step of the scientific method is to analyze information or data collected from the experiment to conclude whether the hypothesis is supported.

    Recall that these make up the scientific method, described below:

    • Problem: The question created because of an observation. Example: Does the size of a plastic object affect how fast it naturally degrades in a lake?
    • Research: Reliable information available about what is observed. Example: Learn how plastics are made and understand the properties of a lake.
    • Hypothesis: A predicted solution to the question or problem. Example: If the plastic material is small, then it will degrade faster than a large particle.
    • Experiment: A series of tests used to evaluate the hypothesis. Experiments consist of an independent variable that the researcher modifies and a dependent variable that changes due to the independent variable. They also include a control group used as a standard to make comparisons. 
      • Example: Collect plastic particles both onshore and offshore of the lake over time. Determine the size of the particles and describe the lake conditions during this time period.
    • Observe: Analyze data collected during an experiment to observe patterns. 
      • Example: Analyze the differences between the numbers of particles collected in terms of size.
    • Conclusion: State whether the hypothesis is rejected or accepted and summarize all results.
    • Communicate: Report findings so others can replicate and verify the results.