Ecology Final Exam-2024

When you step out into the cold, your body shivers in order to keep its temperature at 98.6 degrees F. Which of the following characteristics of life are you exhibiting?

• All living things use energy
• All living things maintain homeostasis
• All living things contain cells
• All living things grow

The diagram below shows a T4 bacteriophage. This virus consists of a single strand of DNA enclosed in a protein capsule. It reproduces with aid of another organism's DNA and cellular process, but not on its own. Is it alive?

• No, because it doesn't move.
• No, because it is missing one of the characteristics of living things.
• Yes; since the virus contains DNA, it is a living organism.
• Yes; since the virus contains protein, it is a living organism.

Green plants produce their own food through the process of photosynthesis. Which characteristic of life are they exhibiting?

• All living things use energy
• All living things maintain homeostasis
• All living things contain cells
• All living things grow

Which statement best explains why these cells have structural differences?

• The cells have differentiated, therefore having different functions/appearances.
• They are stem cells.
• One of the cells develops into the other type of cell.
• One of the cells came from a unicellular organism.

Life functions are performed at many levels of biological organization. Which level of biological organization is the simplest level at which a structure can support life functions?

• cell
• tissue
• organelle
• organ

Which level in a food web contains the highest amount of total available energy?

• secondary consumer
• decomposer
• producer

Which of the following living things would be found closest to the beginning of a food chain?

• scorpion
• mushroom
• caterpillar

Based on the food chain shown above, energy in this ecosystem flows from

• mouse to the plant
• snake to the mouse
• mouse to the snake

Which level in the diagram below represents the primary consumers?

• Snakes and Hawks
• Mice, Gophers, and Birds
• Coyotes

Examine the food web below. Which organisms in the food web are primary consumers?

• Algae and Oak Tree
• Fox, Eagle and Mountain Lion
• Minnow, Aphid and Caterpillar