Biology Cross Word

2. Groups of individuals of the same species that live in the same area.
4. Structures that have no apparent function and appear to be residual parts from a past ancestor.
7. Selection A mechanism of evolution.
8. Symbiotic relationship in which both species benefit from the relationship.
10. Part of earth in which life exists, including land, water, and air or atmosphere.
12. Study of past and present distribution of organisms.
13. An organism's ability to survive and reproduce in a particular environment
15. Similar physical features in organisms that share a common ancestor, but the features serve completely different functions.
16. The remains or impression of a prehistoric organism preserved in petrified form or as a mold or cast in rock.
18. Organism that relies on other organisms for its energy and food supply, also called a heterotroph.
19. An herbivore is an organism that mostly feeds on plants.
20. Largest number of individuals of a particular species that a particular environment can support.
23. Ancestral organism shared by two or more descendent lineages.
26. Physical change in an organism that results over time in reaction to its environment.
27. Network of complex interactions formed by the feeding relationships among the various organisms in an ecosystem.
29. An interaction between organisms or species in which both require a resource that is in limited supply.

1. Body parts that share a common function, but not an evolutionary history.
3. The physical separation of members of a population.
5. Relationships in which two species live close together.
6. The branch of biology and medicine concerned with the study of embryos and their development.
9. A person who moves away from his or her place of usual residence, whether within a country or across an international border, temporarily or permanently, and for a variety of reasons.
11. The process by which species adapt over time in response to their changing environment.
13. Series of steps in an ecosystem in which organisms transfer energy by eating and being eaten.
14. Symbiotic relationship in which one organism benefits and the other is neither helped nor harmed.
17. All the organisms that live in a place, together with their nonliving environment.
21. Selective breeding of plants and animals to promote the occurrence of desirable traits in offspring.
22. The movement of genes into or out of a population.
24. A carnivore is an organism that mostly eats meat, or the flesh of animals.
25. Group of ecosystems that share similar climates and typical organisms.
28. Group of similar organisms that can breed and produce fertile offspring.