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Questions in biology

[Free] Differences between DNA and RNA include which of the following? 1. RNA consists of one nucleotide chain. 2. RNA contains the nitrogen base uracil instead of thymine. 3. RNA contains the sugar ribose instead of deoxyribose. a. 1, 2, and 3 b. 1 and 2 c. 2 and 3 d. 2 only

[Free] What are the kingdom and phylum of a Euglena protist?

[Free] A biome that contains a layer of permanently frozen soil, called permafrost, would be classified as: A. taiga B. desert C. tundra D. savannah E. temperate deciduous forest

[Free] Most autotrophs make "food" through the process of: A. photosynthesis B. homeostasis C. chemosynthesis D. cellular respiration

[Free] How do enzymes help to carry out biochemical reactions? A. By decreasing the energy of the reactants B. By increasing the activation energy of the reaction C. By decreasing the activation energy of the reaction D. By increasing the energy of the products of the reaction E. By decreasing the energy of the products of the reaction

[Free] Name three major adaptations for life during the late Precambrian.

[Free] Predatory and parasitic relationships both involve two different species. What is similar about both a predatory and parasitic relationship?

[Free] Which period was the "golden age of dinosaurs"? A. the Triassic Period B. the Jurassic Period C. the Cretaceous Period D. the Tyrannosaurus Period

[Free] A tree was chopped down and cut up in a local forest. The tree changed in shape. What kind of change took place? A. chemical change B. physical change C. phase change D. change in reaction

[Free] Why is the genetic code read three bases at a time?