Which of the following is mismatched?

anaphase--sister chromatids are pulled to separate ends of the cell

metaphase -- chromosomes line up at the center of the cell

telophase -- nuclear envelope is breaking down; chromosomes are condensing

interphase -- cell is going about its daily business, at the end DNA is duplicated and starts condensing

Answer and Explanation

The Correct Answer is C

A. anaphase – sister chromatids are pulled to separate ends of the cell: During anaphase, sister chromatids separate and move to opposite poles.
B. metaphase – chromosomes line up at the center of the cell: In metaphase, chromosomes align at the metaphase plate.
C. telophase – nuclear envelope is breaking down; chromosomes are condensing: In telophase, the nuclear envelope is reforming, and chromosomes are de-condensing into chromatin. The description given fits prophase, not telophase.
D. interphase – cell is going about its daily business, at the end DNA is duplicated and starts condensing: During interphase, the cell grows and replicates DNA in preparation for mitosis.

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Correct Answer is B

Explanation

A. an electron: An electron is a subatomic particle; it doesn’t retain the chemical properties of the element.
B. an atom: The atom is the smallest unit of an element that maintains its chemical identity and properties.
C. a chemical bond: A bond is the interaction between atoms, not a part of an element.
D. a proton: A proton is also a subatomic particle; it contributes to identity (atomic number) but isn’t an element by itself.
E. an orbital: An orbital is a region around the nucleus where electrons are likely to be found-it is not a unit of matter.

A. as body temperature rises, sweating occurs to cool the body B. after drinking large amounts of water, urine output decreases to raise blood volume C. decreases in blood pressure cause a corresponding decrease in heart rate D. as blood pressure falls, blood flow to the heart decreases

Correct Answer is A

Explanation

A. As body temperature rises, sweating occurs to cool the body:
An example of negative feedback, where the body counters a change to restore normal state.

B. After drinking large amounts of water, urine output decreases to raise blood volume:
Urine output would actually increase to excrete the excess water and maintain volume.

C. Decreases in blood pressure cause a corresponding decrease in heart rate:
A decrease in blood pressure should cause the heart rate to increase (compensatory response).

D. As blood pressure falls, blood flow to the heart decreases:
The body usually increases heart rate and vasoconstriction to maintain cardiac output.

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Which of the following is mismatched?

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