en CR PROGRAM 23: Life Science 17 Cell : The smallest unit that can perform all the processes necessary for life. Cells are covered by a membrane and have DNA and cytoplasm. Cell Membrane : A protective layer that covers the cell's surface and acts as a barrier. The cell membrane separates the cell's contents from its environment and controls materials going into and out of the cell. Cell Wall : A rigid structure that surrounds the cell membrane and provides support to the cell. Cellular Respiration : the process by which cells use oxygen to release energy from glucose. chloroplast : Only in plant cells, the green structures that absorb the sun's energy, enabling the plant to produce sugar. It contains a green substance called chlorophyll. Classification : the identification, naming, and grouping of organisms into a formal system. DNA: Hereditary material that controls all the activities of a cell and contains the information to make new cells, The molecule that carries genetic instructions. Ecosystem: A community of different organisms and their nonliving environment. Evolution: Describes the slow genetic change in populations of organisms over time. Food web: a feeding pattern that slows the energy transfer throughout an ecosystem. Gene: a unit of DNA by which traits are passed from parent to offspring. Genetics: the scientific study of how traits are inherited. Genome: the entire genetic code of an individual or species. Habitat: the place in an ecosystem where a species lives. Mitosis: the process by which most cells reproduce; cell division. Nucleus: in a cell, the structure that contains genetic material and control the cell's activities. Photosynthesis: The process by which green plants use carbon dioxide, water, and energy from the sun and convert it into sugar and oxygen to make their own food . Species: a group of organisms that resemble one another and that produce fertile offspring when they interbreed.

PROGRAM 23: Life Science

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Across:

7.	A protective layer that covers the cell's surface and acts as a barrier. The cell membrane separates the cell's contents from its environment and controls materials going into and out of the cell.
9.	Hereditary material that controls all the activities of a cell and contains the information to make new cells, The molecule that carries genetic instructions.
11.	a group of organisms that resemble one another and that produce fertile offspring when they interbreed.
14.	a unit of DNA by which traits are passed from parent to offspring.

15.	Describes the slow genetic change in populations of organisms over time.
16.	the process by which most cells reproduce; cell division.
17.	The smallest unit that can perform all the processes necessary for life. Cells are covered by a membrane and have DNA and cytoplasm.

Down:

1.	in a cell, the structure that contains genetic material and control the cell's activities.
2.	Only in plant cells, the green structures that absorb the sun's energy, enabling the plant to produce sugar. It contains a green substance called chlorophyll.
3.	the place in an ecosystem where a species lives.
4.	the identification, naming, and grouping of organisms into a formal system.
5.	A community of different organisms and their nonliving environment.

6.	A rigid structure that surrounds the cell membrane and provides support to the cell.
8.	The process by which green plants use carbon dioxide, water, and energy from the sun and convert it into sugar and oxygen to make their own food .
10.	the scientific study of how traits are inherited.
12.	a feeding pattern that slows the energy transfer throughout an ecosystem.
13.	the entire genetic code of an individual or species.

PROGRAM 23: Life Science

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Across:

7.	A protective layer that covers the cell's surface and acts as a barrier. The cell membrane separates the cell's contents from its environment and controls materials going into and out of the cell.
9.	Hereditary material that controls all the activities of a cell and contains the information to make new cells, The molecule that carries genetic instructions.
11.	a group of organisms that resemble one another and that produce fertile offspring when they interbreed.
14.	a unit of DNA by which traits are passed from parent to offspring.

15.	Describes the slow genetic change in populations of organisms over time.
16.	the process by which most cells reproduce; cell division.
17.	The smallest unit that can perform all the processes necessary for life. Cells are covered by a membrane and have DNA and cytoplasm.

Down:

1.	in a cell, the structure that contains genetic material and control the cell's activities.
2.	Only in plant cells, the green structures that absorb the sun's energy, enabling the plant to produce sugar. It contains a green substance called chlorophyll.
3.	the place in an ecosystem where a species lives.
4.	the identification, naming, and grouping of organisms into a formal system.
5.	A community of different organisms and their nonliving environment.

6.	A rigid structure that surrounds the cell membrane and provides support to the cell.
8.	The process by which green plants use carbon dioxide, water, and energy from the sun and convert it into sugar and oxygen to make their own food .
10.	the scientific study of how traits are inherited.
12.	a feeding pattern that slows the energy transfer throughout an ecosystem.
13.	the entire genetic code of an individual or species.