tissue consists of interacting cells and
a. blood cells.
b. pigmented skin cells.
c. extracellular substances.
d. nerve cells.
e. none of these.
Answer: c
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Chromatin consists of about
A) 10% histones, 30% DNA binding proteins, 30% DNA, and 30% RNA. B) 25% histones, 25% DNA binding proteins, 25% DNA, and 25% RNA. C) 30% histones, 30% DNA binding proteins, 30% DNA, and 10% RNA. D) 10% histones, 10% DNA binding proteins, 70% DNA, and 10% RNA.
Experimentation
A. provides a means to gather objective data. B. is designed to support an hypothesis. C. provides a means to gather subjective data. D. is designed to refute an hypothesis. E. is the first step in the scientific method.
For this problem, you may want to create a Punnett Square on a separate piece of paper. Manuel has both cystic
fibrosis, a recessive disorder, and sickle cell anemia which is also a recessive disorder. Manuel’s partner, Lucretia, is normal for both conditions. What is the probability that Manuel and Lucretia will have a normal child without either of the conditions Manuel has?
a. 0% b. 25% c. 75% d. 100% e. It is not possible to solve this problem with the information provided.
Which of the following are consequences of hyperventilation?
a. Increasing H+ levels b. Increasing alveolar PCO2 c. Decreasing arterial PCO2 d. Higher blood pH