Represented by only one living genus, Equisetum, these seedless vascular plants have leaves in whorls
around a photosynthetic stem that is stiff and gritty because they accumulate silica in their tissues
a. mosses
b. whisk ferns
c. ferns
d. club mosses
e. horsetails
E
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Topoisomerase functions by ____
a. creating cuts in the DNA to relieve over-twisting and strain ahead of the replication fork b. binding DNA polymerase to hold it tightly to the template DNA c. unwinding the DNA double helix to expose the template strands for replication d. binding the newly synthesized DNA to re-twist it into a double helix after replication e. reading the DNA template and synthesizing a complementary strand of DNA
A community differs from an ecosystem in that the former does NOT include
a. unicellular organisms. b. decomposers. c. abiotic (nonliving) factors. d. unicellular organisms and decomposers. e. unicellular organisms, decomposers, and abiotic (nonliving) factors.
Subluxation
What will be an ideal response?
Point mutations can occur in any given cell type, but they mostly affect only that one cell and cells produced by it. What cell type, if mutated, would allow the mutation to be passed on to family members for generations?
A) glial cells, such as those that produce a myelin sheath B) skin cells C) white blood cells D) gametes, such as an egg or sperm