Diversity of Life 2.1
Learning Target: Multicellular organisms meet their needs in different ways.
Review:
Organisms get energy and materials from the environment.
All organisms are organized, grow, respond, and reproduce.
Differences in genetic material lead to diversity.
In single-celled organisms, all the functions of life are performed by one cell. These functions include getting energy and materials, removing wastes, and responding to changes in the environment. In multicellular organisms, however, different jobs are done by different cells-the cells are specialized. A blood cell carries oxygen. A nerve cell sends and receives signals.
Learning Target: Multicellular organisms meet their needs in different ways.
Review:
Organisms get energy and materials from the environment.
All organisms are organized, grow, respond, and reproduce.
Differences in genetic material lead to diversity.
In single-celled organisms, all the functions of life are performed by one cell. These functions include getting energy and materials, removing wastes, and responding to changes in the environment. In multicellular organisms, however, different jobs are done by different cells-the cells are specialized. A blood cell carries oxygen. A nerve cell sends and receives signals.
Organization starts with the cell. Cells of the same type are organized into tissue, a group of cells that work together. For example, what you think of as muscle is muscle tissue, made up of many muscle cells.
A structure that is made up of different tissues is called an organ. Organs have particular functions.
TASK
List 5 organs and describe their functions.
Different organs that work together and have a common fuction are called an organ system. A heart and blood vessels are different organs that are both part of the circulatory system.
Together, cells, tissues, organs and organ systems form an organism.
Task
Research and list the organ systems of the human body.
A structure that is made up of different tissues is called an organ. Organs have particular functions.
TASK
List 5 organs and describe their functions.
Different organs that work together and have a common fuction are called an organ system. A heart and blood vessels are different organs that are both part of the circulatory system.
Together, cells, tissues, organs and organ systems form an organism.
Task
Research and list the organ systems of the human body.
Multicellular organisms are adapted to live in different environments!
All organisms have characteristics that allow them to survive in their environment. An adaptation is any inherited characteristic that increases the chance of an organism's surviving and producing offspring that also reproduce. An adaptation may have to do with the way an organism gets its energy or processes materials. An adaptation may relate to the shape or structure of an organism's body. An adaptation can even be a form of behavior.
Complete the webquest below.
All organisms have characteristics that allow them to survive in their environment. An adaptation is any inherited characteristic that increases the chance of an organism's surviving and producing offspring that also reproduce. An adaptation may have to do with the way an organism gets its energy or processes materials. An adaptation may relate to the shape or structure of an organism's body. An adaptation can even be a form of behavior.
Complete the webquest below.
Learning Target: Sexual reproduction leads to diversity!
Sexual reproduction leads to diversity because the DNA in the offspring is different from the DNA in the _______________.
Two different cellular processes are involved in sexual reproduction. The first is meiosis, a special form of cell division that produces sperm cells in a male and egg cells in a female. Each sperm or egg cell contains only one copy of DNA.
The second process in sexual reproduction is fertilization. Fertilization occurs when the sperm cell from the male parent combines with the egg cell from the female parent. A fertilized egg is a single cell with DNA from both parents. Once the egg is fertilized, it divides. One cell becomes two; two cells become four, and so on. As the cells divide, they start to specialize, and different tissues and organs form.
What is….
Asexual Reproduction (give organism example)
Sexual Reproduction
Internal fertilization
External fertilization
Hermaphrodite
Sexual reproduction leads to diversity because the DNA in the offspring is different from the DNA in the _______________.
Two different cellular processes are involved in sexual reproduction. The first is meiosis, a special form of cell division that produces sperm cells in a male and egg cells in a female. Each sperm or egg cell contains only one copy of DNA.
The second process in sexual reproduction is fertilization. Fertilization occurs when the sperm cell from the male parent combines with the egg cell from the female parent. A fertilized egg is a single cell with DNA from both parents. Once the egg is fertilized, it divides. One cell becomes two; two cells become four, and so on. As the cells divide, they start to specialize, and different tissues and organs form.
What is….
Asexual Reproduction (give organism example)
Sexual Reproduction
Internal fertilization
External fertilization
Hermaphrodite