Online Access Free Introduction-to-Biology Practice Test

Refer to the diagram "Arctic Marine System Components."

Which components in the figure areabiotic?

• A.Organic deposits, lobster, and polar bear
• B.Sunlight, organic deposits, and phytoplankton
• C.Sea ice and CO#
• D.Fish and zooplankton

Glycolysis yields a net of two ATP molecules produced by phosphorylation. Which statement about the energy transformationin this process is true?

• A.Energy is transformed into a form more useful for the cell.
• B.Energy is transformed into a long-term storage form.
• C.Energy is destroyed.
• D.Energy is created.

What is thefunction of the centromereduring M phase?

• A.Pushing each sister chromatid to one of the poles
• B.Holding sister chromatids together until they separate to move to opposite poles
• C.Keeping chromosomes condensed and packaged during cell division
• D.Copying the chromosomes

The humanMN blood groupis determined by two codominant alleles (MandN). In one family,alloffspring are MN. What are themost probable genotypesof the parents?

• A.MM and NN
• B.MM and MN
• C.NN and MN
• D.MN and MN

Homologous chromosome pairsare undergoing crossing over but havenot yet lined upat the cell's midline.
Which stage is this?

• A.Prophase I
• B.Prophase II
• C.Anaphase II
• D.Anaphase I