Which statement about biomes is TRUE? Biomes never change over time

Biomes are determined by climate, plants, and animals

Biomes are only terrestrial, not aquatic

Biomes are unaffected by humans

Which best describes red blood cells? a. they are colorless b. they protect against disease-carrying microorganisms c. they transport oxygen throughout the body d. they aid in blood clotting

Compare the depth of field when focusing with low power and high power. which power has the greater depth of field?

Which statement describes an endocrine function rather than an exocrine function? a. salivary glands release saliva into the mouth. b. sweat glands release sweat onto the skin c. the pineal gland releases melatonin into the blood. d. esophageal glands release mucus into the esophagus.