Biology Second Quarter Exam

Which is an advantage of sexual reproduction compared to asexual reproduction?

• increased survival rates in an unchanging environment

• increased genetic diversity

• increased rate of reproduction

• less energy required for reproduction

The diagram models a process that occurs during the cell cycle. What is taking place in the process shown?

• RNA replication

• cytoplasm division

• sexual reproduction

• binary fission

What is the purpose of DNA replication in the cell cycle?

• to replace old DNA

• to increase genetic diversity

• to have two sets of DNA

• to help the cell grow larger

Which process is used for growth and the repair of injuries?

• Crossing Over

• Mitosis

• Meiosis

• Apoptosis

Some species are able to reproduce either sexually or asexually. What is a drawback of a population using asexual reproduction only?

• High genetic diversity puts the population at risk to environmental change.

• Low genetic diversity puts the population at risk to environmental change.

• High genetic diversity prevents the population from expanding its territory.

• Low genetic diversity prevents the population from expanding its territory.

The diagram models the processes that take place during the cell cycle. What is taking place during the S phase?

• DNA replication

• cytoplasm division

• DNA repair

• cell growth

What is taking place during the G₁ phase?

• DNA replication

• cytoplasm division

• DNA repair

• normal cell functions

A student is labeling a diagram of mitosis. Which description should the student label as anaphase?

• The chromosomes separate and move along spindle fibers to opposite ends of the cell.

• The chromosomes, which were distinct and condensed, begin to spread out into a tangle of chromatin.

• The centromeres of the duplicated chromosomes line up across the center of the cell.

• The genetic material inside the nucleus condenses and the duplicated chromosomes become visible.

Which of the following distinguishes cancer cell division from normal cell division?

• uncontrolled cell growth

• cytoplasm division

• DNA repair

• normal cell functions

The Punnett square describes the potential offspring of a cross. What phenotypes will be shown by the offspring?

• All offspring will show the recessive phenotype for this trait.

• All offspring will show the dominant phenotype for this trait.

• Half of the offspring will show the dominant phenotype and half will show the recessive phenotype.

• Three fourths of the offspring will show the dominant phenotype and one fourth will show the recessive phenotype.