Which of the following types of cellular changes would be considered malignant?
a) dysplasia
b) squamous cell carcinoma
c) papilloma
d) adenoma
Answer: b) squamous cell carcinoma
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Which of the following statements is TRUE?
A) Fimbriae are generally shorter and more numerous than flagella. B) Fimbriae enable cells to stick to surfaces. C) Pili serve as receptors and facilitate genetic exchange between prokaryotic cells. D) Fibriae are usually shorter than flagella and enable cells to adhere to surfaces, whereas pili are involved in genetic exchange.
Which algae are MOST closely related to plants?
A) red algae B) green algae C) brown algae D) euglenoids
Explain how reproductive isolation is central to the biological species concept
What will be an ideal response?
When a "new" antigen first challenges the immune system, if the primary immune response produces B cells, what are the fates of those B cells?
I-Some of the B cells become plasma cells that secrete antibodies. II-Some of the B cells become memory cells and can produce a swifter response if the body encounters that particular antigen again. III-Some of the B cells secrete chemicals called pyrogens that travel to the brain inducing a fever. A. just II B. just I C. II and III D. I and II E. I, II, and III