Rough endoplasmic reticulum is studded with ribosomes.
Answer the following statement true (T) or false (F)
True
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Which of the following is the best modern definition of evolution?
A) descent with modification B) change in the number of genes in a population over time C) survival of the fittest D) inheritance of acquired characters
In a species of salamander, there are two forms, red and yellow. As the yellow form becomes less common due to predation and the red form more common, the yellow form becomes less likely to be eaten and more likely to survive and reproduce. The yellow form then becomes more common and roles of red and yellow forms reverse. This maintains both forms in the population. This would be an example of
A. negative frequency-dependent selection. B. directional selection. C. disruptive selection. D. balancing selection. E. negative frequency-dependent selection and balancing selection are correct.
Which of the following is closest to a micrometer in size?
A) the width of a strand of DNA B) the length of a plant cell C) the length of a chicken egg D) a typical prokaryotic cell E) the size of a ribosome
White blood cells are a type of
A) Connective tissue B) Epithelial tissue C) Muscle tissue D) Nervous tissue