a substance has an atomic number of 80. how many protons and electrons do atoms of the substance have? What is the substance?

Given the distribution of the 30 or so animal phyla across the Earth's various ecosystems, what would be the most likely habitat for the origin of animals?

Large areas of land are being developed. In the process thousands of trees are being removed and bumes How would this affect the cycle?

2) If a species of anoles with dark dewlaps colonized a heavily forested island, predict what would happen over time to the colour of the dewlap. Using your knowledge of natural selection and genetics, explain your prediction.

Which states of matter have particles that move independently of one another with very little attraction? a. gas and plasma b. liquid and gas c. solid, liquid, and gas d. liquid, gas and plasma

Food is contained in the gastrointestinal tract from the time of ingestion until it is completely digested and the waste prepared for elimination. True False

Which characteristics make estuaries productive ecosystems?

Kayla has a cat with blue eyes. The color of her cat's eyes is determined by DNA. The DNA directs which substance to construct these eyes? A. lipids B. water C. proteins D. carbohydrates

The modern synthesis refers to: a. the combination of anthropology and biology b. the combination of modern genetics and Darwinism. c. the combination of modern anthropology with animal behavior d.

Is the pattern on a butterfly's wing unique to each?

Dichotomous keys ask