biology

3. The adjustable opening in the center of the eye that controls light entry.
5. The process by which plants convert sunlight into energy.
9. The ability to maintain a stable internal environment in an organism.
12. The protective covering around nerve fibers that facilitates signal transmission.
13. The process by which species change over time through natural selection.
14. A diverse group of mostly unicellular organisms, including algae and protozoa.
16. The process of widening blood vessels to enhance blood flow.
17. A cluster of capillaries in the kidneys where blood filtration occurs.
18. The movement of particles from an area of higher concentration to one of lower concentration.
19. the method of producing genetically identical organisms.
20. Describing processes that occur without oxygen.

1. A specialized form of cell division that produces gametes with half the chromosome number.
2. Referring to reactions that absorb heat from their surroundings.
4. White blood cells essential for the immune response.
6. Vascular tissue responsible for water transport in plants.
7. The narrowing of blood vessels, reducing blood flow.
8. Plant tissue that transports sugars and nutrients.
10. The interior space of a tubular structure, such as a blood vessel or intestine.
11. The gap between two neurons where information is transmitted.
15. The process of organizing actions and responses in the body.