PMA 3 - Life Science Review

PMA 3 Review - Life Science Part A

Hierarchical Organization of Life, Cells, & Homeostasis

Multiple Choice

Which of the following is correct about structure L?

• It holds chlorophyll.

• It stores the cell's DNA.

• It is only found in plant cells.

• It is composed of lipids and proteins.

Multiple Choice

All cells must carry out three basic functions to grow and pass on life. How do cells perform these three basic functions?

• They utilize a source of energy, release waste, and form new cells.

• They send out signals, extract food, and breathe carbon dioxide.

• They develop new tissues, make fats, and form new cells.

• They drink water, breathe oxygen, and release waste.

Multiple Choice

The table below shows the characteristics of a plant leaf cell and an animal skin cell. Which characteristic is missing from the table?

• Have a cell life of five to ten days

• Perform photosynthesis to make energy

• Get rid of waste to maintain homeostasis

• Communicate with cells of different organisms

Multiple Choice

Which of the following is an example of an organ system?

• A heart, arteries and veins all working together

• The living materials that lines the inside of a cheek

• A human bladder, which stores waste for removal

• The top layer of cells on a plant leaf

Multiple Choice

The picture below shows a cross-section of a plant stem viewed through a microscope. The enriched region Y, of the cross-section is involved in creating support for the plant. Which level of organization is best represented by region Y?

• Cell

• Tissue

• Molecule

• Organ System

Multiple Choice

The heart is made of several types of tissues, each having a separate function in pumping blood throughout the body. At which level of organization would the heart be placed?

• Cell

• Atom

• Organ

• Organ System

Multiple Choice

Chloroplasts are the organelles responsible for photosynthesis in plants. If all the chloroplasts in a plant lose function as a result of a genetic disorder, what will happen to the plant?

• It will find energy in the soil instead of from sunlight.

• It will evolve a new mechanism for generating food.

• Its growth rate will slow or stop.

• it will grow longer roots in search of food.