White blood cells produce antibodies to destroy......
The disease causing microorganisms have protein markers called antigens on their surface
Answer:
maintaning the essential internal parameters relatively constant is the phrase that best describes the process of homeostasis.
The factor that would least affect photosynthesis is Nitrates in the soil.
Photosynthesis is the process by which plant make their own food by utilizing energy from sunlight, water and carbon dioxide. The limiting factors that affect photosynthesis are the light intensity, carbon dioxide concentration, temperature and water. Without enough light, a plant cannot photosynthesize very quickly, even if there is plenty of water and carbon dioxide.
I think its 2 but im not 100% sure