Which statement describes a similarity between meiosis and mitosis?
a. Both halve the chromosome number of the parent cell.
b. Both produce 4 daughter cells.
c. Crossing-over occurs in both.
d. Both create genetically different daughter cells.
e. DNA is replicated only once in both processes.
ANSWER: e
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a. TH2 cells b. macrophages c. plasma cells d. eosinophils
How does peer review influence the development of scientific theories?
A. Peer review makes it extremely difficult for work to be published other than earth-shattering scientific theories. B. Careful evaluation of research results by other scientists ensures that only solid and legitimate research results are published, and helps prevent faulty research or false claims from being viewed as scientific fact. C. Peer review increases competition among scientists and thus increases the quality of the published work. D. Peer review allows other scientists to know what is current in their field.
Which species is an invasive species?
A) pika in the western United States B) brown tree snake in Guam C) polar bear in Norway D) brown pelican off the coast of Louisiana
Three-dimensional images of specimens can be obtained using scanning electron microscopes
Indicate whether the statement is true or false