Answer the following statements true (T) or false (F)
1. Although not well understood, the Cambrian Explosion most likely occurred due to changes in sea level and continental drift.
2. The first bilateral animal emerged during the Ordovician Period. Fossils of this organism were discovered in South Africa.
3. The eukaryotic genome is comprised entirely of genes derived from Archean ancestors.
4. Molecular homologies indicate that living species evolved from a common ancestor or interrelated group of common ancestors.
1. FALSE
2. FALSE
3. FALSE
4. TRUE
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Living or dead organisms that occupy an organism's habitat are called biotic factors.
Answer the following statement true (T) or false (F)
Which of the following is not an effect of epinephrine throughout the body?
A. Promotes the breakdown of glycogen in skeletal muscle cells B. Relaxes lung airways C. Stimulates heart muscle cells D. A person feeling energized after drinking a cup of caffeinated coffee E. The body's ability to digest a large meal
Energy in organic wastes is indicated by
a. A. b. B. c. C. d. D. e. E.
_______ are the primary sources of most antibiotics.
A) Bacteria and viruses B) Viruses and protistans C) Protistans and fungi D) Fungi and bacteria