Soil from flat, poorly drained areas on clay substrate is likely to be have what sort of coloration?

Which is not a characteristic of the animal kingdom? a. they include both vertebrates and invertebrates b. their skin is covered with hair or fur c. they are heterotrophs d. they are eukaryotic

Which blood cell spend most of their time in the lymphatic system?

Why does bubbling occur when vinegar mixed with baking soda