Keystone Biology Practice

At a point in the cell cycle, chromosomes have aligned near the middle of a cell. Which sequence of events will the cell need to complete to produce two identical daughter cells?

• anaphase - telophase - cytokinesis

• anaphase II - telophase II - cytokinesis II

• prophase - metaphase - anaphase

• metaphase II - anaphase II - telophase II

Tags

NGSS.HS-LS1-4

Which student correctly compared the outcomes of meiosis and mitosis?

• student 1

• student 2

• student 3

• student 4

Tags

NGSS.HS-LS1-4

The DNA Replication diagram is incomplete. Which nucleotide sequence accurately shows the DNA strand that would be produced during DNA replication?

• TCCA

• AGGT

• UCCU

• AGGU

The genetic event shown in the diagram can occur during meiosis. Which statement best describes this type of event?

• Gene sequences that are identical are replicated and added to the homologous chromosome

• Sections of DNA between nonhomologous chromosomes are exchanged, decreasing genetic diversity

• Segments of homologous chromosomes are exchanged, resulting in cells that will be genetically different.

• The traits from two sections of the same DNA strand are altered, resulting in the production of a new species.

Tags

NGSS.HS-LS3-2

Which activity would a cell be unable to perform if a mutation occurred that caused the Golgi apparatus to stop functioning?

• packaging proteins for transport out of the cell

• processing mRNA as it is transcribed from DNA strands

• providing the location for the delivery of amino acids by tRNA

• producing a template to guide the sequencing of amino acid chains

Which statement describes how cloning is different from selective breeding?

• Cloning eliminates recessive alleles from a genome.

• Cloning transforms harmful traits into beneficial traits.

• Cloning corrects or replaces mutated gene sequences.

• Cloning results in offspring genetically identical to the parents

Which statement best describes how geographic isolation can contribute to land animal speciation?

• Geographic isolation physically separates populations but allows them to interact

• Geographic isolation physically separates populations and prevents them from interacting.

• Geographic isolation causes genetic changes in individual organisms but allows them to interact.

• Geographic isolation causes genetic changes in individual organisms and prevents them from interacting

Tags

NGSS.HS-LS4-2

NGSS.HS-LS4-4

Whales have vestigial femurs and pelvic bones. Which statement explains why the vestigial structures are most likely present in whales?

• Whales evolved over time from ancestors that lived on land.

• Whales evolved over time from fish species that once lived on land

• Hind legs are an adaptation in whales that is selected for as they evolve into land mammals.

• Hind legs are an evolutionary adaptation observed in whales that walk along the ocean floor

Tags

NGSS.HS-LS4-1

NGSS.HS-LS4-4

A student listed characteristics of a classroom aquarium ecosystem. Which characteristic is a biotic component of the aquarium ecosystem?

• The water temperature is 23°C.

• The pH of the water is usually between 6.5 and 6.8.

• The ammonia is controlled with a filter that uses two types of bacteria

• The lighting is supplied by natural sunlight and a fluorescent light bulb.

Tadpoles grown in ponds with high densities of tadpoles have lower survival and growth rates than tadpoles grown in ponds with lower densities of tadpoles. Which interaction between tadpoles grown in high-tadpole-density ponds would most likely cause the decreased survival and growth rates?

• symbiosis

• mutualism

• competition

• commensalism

Tags

NGSS.HS-LS2-2

NGSS.HS-LS2-6