________ are the blood cells that carry oxygen throughout the body.
A. Platelets
B. Leukocytes
C. Erythrocytes
D. Thrombocytes
Answer: C
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Both genes and the _______ influence the traits of an organism
A. genome B. environment C. population
Which of the following did not occur during Precambrian time?
A. ancestors of all modern animals appeared B. O2 accumulated in Earth's atmosphere C. eukaryotes arose D. photosynthesis evolved E. life originated
Body parts that are similar in different lineages because the lineages have a common ancestor are ____
a. homologous structures b. comparative structures c. analogous structures d. repetitive structures e. vestigial structures
EACH of the following features makes phage M13 an ideal genetic engineering tool for cloning and DNA sequencing EXCEPT
a. rapid lysis of host cells, yielding high virion bursts and multiple copies of cloned DNA. b. small genome size, which facilitates sequencing efforts. c. dsDNA, which is produced in its replicative form.. d. release from host cells without lysis, causing infected cells to act as a continuous source of cloned DNA as long as the culture is maintained.