The influenza virus uses ________ spikes to bind to host cells.
Fill in the blank(s) with the appropriate word(s).
Hemagglutinin
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What activity of Pol I makes it uniquely suited for its role in bacterial DNA replication?
What will be an ideal response?
When homologous chromosomes cross over, what occurs?
A) Two chromatids get tangled, resulting in one re-sequencing its DNA. B) Two sister chromatids exchange identical pieces of DNA. C) Corresponding segments of non-sister chromatids are exchanged. D) Maternal alleles are "corrected" to be like paternal alleles and vice versa.
Jonas Salk's polio vaccine trials of 1954 involved giving placebos to 201,229 children and the polio vaccine to 200,745 children
Out of the placebo group, 142 children developed polio, whereas 57 children from the vaccine group developed polio. Approximately how many more times likely was a child to develop polio if he or she were NOT vaccinated? A) thirty B) ten C) five D) three
Wetlands purify water by removing sediments and pollutants
Indicate whether the statement is true or false