Within each muscle fiber are hundreds or thousands of cylindrical structures that runs the entire length of the muscle fiber. These are called

Abiotic factors are ________.

A. living and nonliving components of an ecosystem B. living components of an ecosystem C. nonliving components of an ecosystem D. None of the above

Two strains of S. cerevisae (yeast) are crossed. One has the genotype ABC and the other abc. Five sets of the resultant tetrads are noted below. In which set did a gene conversion event occur?

A) abc, aBc, AbC, aBC B) abc, abc, ABC, ABC C) aBc, aBc, AbC, AbC D) abC, abc, ABc, ABC E) Abc, Abc, aBC, aBC

________ blots are used to study DNA fragments, while ________ blots are used to study RNA fragments

A) Western, northern B) Southern, western C) Eastern, northern D) Southern, northern E) Western, Southern

Classification.Respond to the following statements in reference to the five animal phyla listed below.

A. B. Trilobites were members of this phylum. C. This phylum has the greatest number of species. D. Although most members are enclosed by hardened shells, this phylum name literally means "soft body." E. The larval stage in this phylum has bilateral symmetry, whereas the adult stage exhibits radial symmetry. F. Members of this phylum use tentacles to push captured prey through the mouth into their gastrovascular cavity.