Red blood cells carry oxygen; white blood cells fight disease.
Answer:
first-level consumers are mostly herbivorous animals, second-level consumers are carnivores that prey on first-level consumers.
Explanation:
Primary consumers cannot eat anything but plants and secondary consumers evolved to be able to hunt primary consumers because they are usually larger and need more energy than plants could provide.
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Answer:
Two
Explanation:
A male and female cromosome
Answer:
Cancer cells also make enzymes that break down normal cells and tissues as they grow. Cancer that grows into nearby tissue is called local invasion or invasive cancer. Cancer can also spread from where it first started to other parts of the body. This process is called metastasis
