Biology

8. is the change in living things over time. More specifically, evolution is a change in the genetic makeup of a subgroup, or population, of a species
9. is the basic unit of life. In fact, microscopic, single-celled organisms are the most common forms of life on Earth.
12. is any individual living thing. All organisms on Earth share certain characteristics
14. includes using our senses to study the world
15. is an organized group of related parts that interact to form a whole.
16. are cylinder-shaped organelles made of short microtubules arranged in a circle
17. are organelles that carry out photosynthesis
18. is a physical environment with different species that interact with one another and with nonliving things
20. is the smallest basic unit of matter.

1. is the movement of molecules in a fluid or gas from a region of higher concentration to a region of lower concentration
2. is a fluid-filled sac used for the storage of materials needed by a cell
3. is a protein that detects a signal molecule and performs an action in response.
4. is a proposed answer for a scientific question. A hypothesis must be specific and testable
5. are catalysts for chemical reactions in living things
6. is the scientific study of all forms of life
7. is the study and comparison of genomes both within and across species. Here again, biologists need to use computers
10. The conditions that do not change during an experiment
11. is the use and application of living things and biological processes
13. provides an enlarged image of an object
19. is a proposed explanation for a wide range of observations and experimental results that is supported by a wide range of evidence