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Questions in biology

[Homework Help] 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

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

[Homework Help] 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

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

[Homework Help] 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

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

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

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

[Homework Help] 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

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