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| Which of the characteristics of life best explains why bears hibernate when it starts to get cold? | Living things respond to their environment. |
| The process by which organisms regulate their internal conditions to maintain internal balance is called ___. | homeostasis (examples include maintaining a certain body temperature for "warm blooded" animals, or maintaining a normal blood sugar level by releasing insulin when blood sugar is too high, or a different hormone called glucagon when the blood sugar level is too low) |
| The smallest thing that can be considered to be living is a ___. | cell |
| The directions for how an organism grows and develops is coded into a molecule called ____. | DNA |
| Changing form as an organism grows is called ___. | development |
| When one type of organism changes over very long periods of time (many many generations), it is called ____. | Evolution |
| What are the two types of cells that all living things are made of? | Prokaryotic and eukaryotic |
| What is the main difference between prokaryotic and eukaryotic cells? | Eukaryotic cells store their DNA inside an organelle called the nucleus (Other differences include the fact that prokaryotic cells are much smaller than eukaryotic cells and lack any type of membrane bound organelle, although the do have an organelle called a ribosome, but it is not surrounded by a membrane) |
| Which type of organisms are made of prokaryotic cells? | Bacteria |
| Which type of organisms are made of eukaryotic cells? | Everything other than bacteria (These include the plant, animal, fungi, and protist kingdoms) |
| What are the tiny structures with specific functions called that are located in the cytosol of cells (mostly eukaryotic cells)? | organelles (Eukaryotic cells are the only type of cell that has membrane-bound organelles, like the nucleus, golgi, vacuoles, etc. These sac-like membranes form separate areas inside the cell where specialized functions can be carried out and specific substances can be stored. Both prokaryotic and eukaryotic cells have ribosomes, which are often referred to as organelles also, but they are solid structures, not hollow sac-like structures like the membrane-bound organelles found in eukaryotic cells) |
| What surrounds both prokaryotic and eukaryotic cells and regulates what goes in and out of the cell? | A membrane |
| Shivering to stay warm and sweating to cool off would be one example of ________. | homeostasis |
| True or False: Organisms with prokaryotic cells are always single-celled. | True (Bacteria, the only organisms with prokaryotic cells, are always single-celled, although some live stuck to other cells, but they could unattach and survive on their own, so each cell is considered to be its own organism) |
| True or False: Organisms with eukaryotic cells are always multi-cellular. | False (Although many, like plants and animals, are, most are still single-celled. There are many single-celled eukaryotic organisms swimming around in water or in soil. Examples include Amoebas and Paramecia. We just don't notice them because they are too small to see without a microscope) |
| True or False: The ability to reproduce is one of the 8 characteristics of life mentioned in your textbook. | True |
| True or False: "All living things are made of cells" is one of the 8 characteristics of life mentioned in your textbook. | True |
| True or False: "All living things are based on a genetic code" is one of the 8 characteristics of life mentioned in your textbook. | True (In fact, all living things use the exact same genetic code to read and decode the instructions in their DNA. That is why a gene from a human can be put into a different organism, like a bacterium, and the organisms will decode it to make the same protein that would be made in the human) |
| True or False: "All living things grow and develop" is one of the 8 characteristics of life mentioned in your textbook. | True |
| True or False: Growth and Development is the same thing. | False (Growth is just getting bigger, like blowing a small picture up into a big picture on your computer. Development is changing shape or adding new things. It's possible to develop without growing. For instance, a caterpillar changing into a butterfly is an example of development, but the butterfly is usually smaller, other than the wings, than the caterpillar it came from) |
| True or False: "All living things need materials and energy" is one of the 8 characteristics of life mentioned in your textbook. | True |
| True or False: "All living things respond to the environment" is one of the 8 characteristics of life mentioned in your textbook. | True (Even something like a plant will grow toward sunlight if placed in a window sill, and seeds won't start to germinate until environmental conditions are favorable) |
| True or False: "All living things maintain internal balance" is one of the 8 characteristics of life mentioned in your textbook. | True |
| True or False: "All populations of any type of species can undergo evolution" is one of the 8 characteristics of life mentioned in your textbook. | True |
| True or False: "All living things need oxygen gas" is one of the 8 characteristics of life mentioned in your textbook. | False (Certain types of single-celled organisms, like bacteria and yeast, can live in environments where there is no oxygen at all.) |
| True or False: "All living things can move" is one of the 8 characteristics of life mentioned in your textbook. | False (Trees can't move, although they can grow and develop in directions that face the sun, and their flowers can close up at night, but they can't move from one place to another. Some animals, like corals and sponges can't move from place to place either) |
