Cycling Of Matter In Living Systems Worksheet printable pdf download

Cycling Of Matter In Living Systems Worksheet

Unit C: Biology (Cycling of Matter in Living Systems) – Assignment Answer Key

C2.1 Check and Reflect #1, 2, 4, 5, 7, 8, 10

1. A system is any unit, structure, or process that has many parts that work together for a

particular goal.

2. The cell is considered an open system because it exchanges energy and matter with its

surroundings.

4. a) The cell membrane consists of a double layer of lipids with a phosphate group

attached to each. It functions as a protective barrier around a cell, allowing

substances to enter and leave the interior of the cell.

b) Vacuoles are storage sites for nutrients, secretions, fats, and water. In plant cells,

the central vacuole is a large storage area for water that swells to create turgor

pressure.

c) Mitochondria are rod-like structures where cellular respiration takes place.

d) Chloroplasts contain chlorophyll and are the site of photosynthesis in plant cells.

5. The associated organelles are:

intake of nutrients – cell membrane

exchange of gases – cell membrane

removal of wastes – lysosomes and cell membrane

The identification of the cell membrane as being associated with each of the processes

shows the important roles that it plays in the function of the cell.

7. Answers will vary, but may include:

Three similarities in the chemical composition of plant and animal cells are:

both contain DNA

•

both have a cell membrane

•

both have an internal cytoskeleton made up of proteins and lipids

•

Three differences are:

plant cells have a cell wall made of cellulose, animal cells do not

•

plant cells contain chlorophyll for photosynthesis

•

plant cells store energy in the form of starch or oils, while animal cells store

•

energy in glycogen or lipids

Cycling Of Matter In Living Systems Worksheet