Across
- 6. what occurs when two groups of the same species evolve different traits
- 8. tiny, single-celled living organisms
- 9. effect the loss of genetic variation that occurs after outside forces destroy most of a population
- 10. a branch of biology dealing with embryos and their development
- 12. how a new kind of plant or animal species is created
- 14. the process whereby organisms better adapted to their environment tend to survive and produce more offspring.
- 17. one of two cycles that a virus can use to reproduce inside a host cell
- 18. type of reproduction that does not involve the fusion of gametes or change in the number of chromosomes.
- 19. reciprocal evolutionary changes brought about by interactions between species
- 20. body structures that help an organism find and consume food and water
Down
- 1. some individuals of the same kind of living thing are more likely to survive than others in their environment.
- 2. an infective agent that typically consists of a nucleic acid molecule in a protein coat
- 3. a viral reproductive stage where the virus's DNA is replicated using the host cell's DNA
- 4. the fact or process of a species, family, or other group of animals or plants becoming extinct.
- 5. the transfer of genetic material from one population to another.
- 7. the change in frequency of an existing gene variant in the population due to random chance
- 11. the independent evolution of similar features in species of different periods or epochs in time
- 13. the production of new organisms by the combination of genetic information of two individuals of different sexes.
- 15. the action or process of adapting or being adapted.A
- 16. one of two or more alternative forms of a gene that arise by mutation