Even though marsupial mammals give birth to live young, an eggshell forms briefly early in their development. This is evidence that a.marsupials share a common ancestor with some egg-laying species;b. marsupials are not really mammals;c. all animals arose from a common ancestor;d. marsupial mammals were separately created by God;e. the fossil record of marsupial mammals is incorrect

If you were given a solution that has a pH of 8.5, what would be its concentration of protons? What is the difference in proton concentration between this solution and one that has a pH of 7?

Contrast the structure of glycogen and chitin in terms of their monosaccharides, glycosidic linkages, and interactions between polysaccharide chains.

Consider the reaction between carbon dioxide and water to form carbonic acid:CO2(g)+H2O(l)⇌CH2O3(aq)In the ocean, carbonic acid immediately dissociates to form a proton and bicarbonate ion, as follows:CH2O3(aq)+H+(aq)⇌CHO3−(aq)If an underwater volcano bubbled additional CO2 into the ocean, would this sequence of reactions be driven to the left or the right? How would this affect the pH of the ocean?

Since the modern synthesis, the technical definition of evolution is a change in in a over the course of generations.a. traits, species;b, allele frequency, population;c. natural selection, natural environment;d. adaptations, single organism;e. fitness, population

Lysozyme, an enzyme found in human saliva, tears, and other secretions, catalyzes the hydrolysis of the ββ-1,4-glycosidic linkages in peptidoglycan. Predict the effect of this enzyme on bacteria and how it may be involved in human health.

Within a few weeks of treatment with the drug 3TC, a patient's HIV population consists entirely of 3TC-resistant viruses. How can this result best be explained?a. HIV can change its surface proteins and resist vaccines.b. The patient must have become reinfected with a resistant virus.c. A few drug-resistant viruses were present at the start of treatment, and natural selection increased their frequency.d. HIV began making drug-resistant versions of its enzymes in response to the drug.

Explain why the overprescription of antibiotics by doctors, or the overuse of everyday soaps containing antibiotics, can be a health risk.

Evaluate this statement: Evolution is said to occur when new traits accumulate over time, increasing complexity.