Answer:
Animal organs and organ systems constantly adjust to internal and external changes through a process called homeostasis (“steady state”). These changes might be in the level of glucose or calcium in blood or in external temperatures. Homeostasis means to maintain dynamic equilibrium in the body
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Below are the answer:
Natural selections need competition in order to take place.
Individuals with favorable traits are <span>more successful</span> in an environment.
Answer:
"Surface water and groundwater are both important sources for community water supply needs. Groundwater is a common source for single homes and small towns, and rivers and lakes are the usual sources for large cities."
Explanation:
High oxygen in the water, low oxygen in the blood
