Cells to Body Systems

4. Ferns reproduce by forming ______ and pine trees reproduce by forming seeds.
5. The moss plant have parent plants that have structures called ______________.
7. A _________ forms when two gametes join.
8. The ______ is the part of a plant that absorbs water and nutrients from the soil.
12. The _________ is part of the digestive system because it makes enzymes that help digest food.
15. The stomach is an organ in the ___________ system.
16. The arthropod group only contains _______________, animals without a back bone.
17. The stomata on a plant help carry out photosynthesis by letting CO2 into the leaf.
18. When I breathe, oxygen goes from my nose to my lungs and then the oxygen enters my _______.
19. ______ are the basic unit of all living things.
20. The ___________ and digestive systems work together to bring nutrients to all the parts of the body.
22. This process only occurs in living things that reproduce sexually.
23. The kidney is an organ in the ____________ system.

1. A bacteria cell does not have a __________.
2. Cells from __________ do not have membrane bound organelles.
3. An fish is a _____________ because it has a back bone.
4. The most specific level of classifications is _________.
6. ______________ must be copied before mitosis can begin.
9. Blood travels from the lungs to the heart and pumped out and travels through _________ to all parts of the body.
10. This is ordered from simplest to most complex: cells -> _________ -> organ -> organ system
11. Mosses are ______________ plants and don't have true roots.
13. Flowering plants which have seeds protected by a fruit are called ______________.
14. An animal behavior such as building shelters and finding food.
21. A ________ behavior is a behavior an animal acquires through experience.