Which of the following statements is TRUE?
A. Interphase chromosomes are loosely compacted, overlapping, and intertwined with each other within the nucleus.
B. Interphase chromosomes are loosely compacted and do not associate with histones until the cell is preparing to divide.
C. Interphase chromosomes are also known as euchromatin. Condensed, metaphase chromosomes are also known as heterochromatin.
D. Radial loop domains are formed due to interactions between 30 nm fibers and intermediate filaments.
E. None of these are TRUE
D. Radial loop domains are formed due to interactions between 30 nm fibers and intermediate filaments.
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Cell differentiation occurs due to ____
a. unequal cytoplasmic divisions b. the removal of different genes in different cell types c. polarization of the cell d. the presence of the X and/or Y chromosome in the cell e. changes in gene expression in different cell types
B. A mature red blood cell is shaped like a biconcave disc because it has no nucleus.
A. its ability to pump blood under high pressure to all areas of the fish's body. B. its ability to maintain a constant blood pressure in the fish. C. its ability to stay full of blood even as it is emptying into the conus arteriosus. D. its ability to pump blood to the gills for gas exchange before the blood is pumped to the remaining areas of the body. E. its ability to keep oxygen-rich blood in one chamber separate from oxygen-poor blood in the other chamber. Clarify Question What is the key concept addressed by the question? What type of thinking is required? Gather Content What do you already know about the effect of exercise on heart rate? What other information is related to the question? Choose Answer Given what you now know, what information is most likely to produce the correct answer? Reflect on Process Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
The behavioral response tested using the models in the accompanying figure is:
a. classical conditioning. b. habituation.
c. imprinting. d. insight. e. a sign stimulus.
A scientific finding is believed to be true until new evidence arises. This view is referred to as:
A) immutable laws. B) a theory. C) a supernatural explanation. D) provisional assent.