Which of the following is likely to be true, based on the following cladogram?
1.Amphibians and lungfishes are sister groups.
2.Amphibians and amniotes both have four limbs and a swim bladder or lungs.
3.Amphibians and lungfishes both have four limbs and a swim bladder or lungs.
4.All of the groups listed have a backbone and a skull.
2
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You may have heard of myosin, a molecule that makes up the bulk of skeletal muscle. It turns out there are many types of myosin, produced from many different genes
These genes are part of a huge superfamily of genes, whose products all bind actin, hydrolyze ATP, and transduce force. All eukaryotic cells contain at least one myosin product. What type of organic molecule is myosin? A. protein B. carbohydrate C. RNA D. DNA E. lipid
A researcher is purifying monomeric immunoglobulins from patients' blood samples. Which immunoglobulin class would you expect to find the most of in these samples? Select all correct choices
A. IgE B. IgM C. IgG D. IgD E. IgA
Which of the following choices places the steps in plant cell-to-cell communication in the correct order?
a. signal is converted to a form that acts inside the receiving cell cell alters growth, metabolism, or gene expression signaling molecule reversibly binds receptor b. cell alters growth, metabolism, or gene expression signaling molecule reversibly binds receptor signal is converted to a form that acts inside the receiving cell c. none of the choices d. signaling molecule reversibly binds receptor signal is converted to a form that acts inside the receiving cell cell alters growth, metabolism, or gene expression
Which of the following describes passive immunity?
A. antibodies transferred to the fetus from the mother across the placenta B. vaccination for polio C. allowing oneself to become infected with chicken pox D. vaccination for influenza E. catching a common cold