Cumulative Exam Answers

A population of ducks lives in an area that floods many times each year. Some of the ducks are better at finding food on dry land, while other ducks are better at finding food in wet, muddy areas. Eventually, the land around the lake permanently changes from dry soil to wet, marshy mud.

Which shows the levels of organization within an ecosystem from largest to smallest?

Earthworms are a species of worms that lives in moist soil along with other organisms like tiny insects and bacteria. Earthworms obtain water and nutrients by eating dead plant material found in the soil. Earthworms also release waste materials that help enrich the soil.

A widow’s peak is dominant over a straight hairline. The genotypes of the offspring are WW, Ww, ww, and ww.

Which scientist most inspired Darwin to pursue his studies of evolution?

How do changes in wind currents affect the short-term climate in a region?

Which example is most similar to the evidence that Darwin used to support his idea of natural selection?

parasitismmutualismcommensalismcompetition

What is one way people have negatively affected land resources?

Which option identifies ways that people positively affect Earth’s resources?

The diagram shows an ocean food web.

The diagram shows a section of DNA.

Carlos made a study chart about changes to the environment that are caused by humans. Environmental Changes Caused by HumansXYResults from introducing harmful substances into the environmentCauses an increase in ultraviolet radiation that reaches Earth Results from the rising human populationCauses the disappearance of many species in a short amount of time

Purple flowers are dominant over white flowers. The parent generation includes two heterozygous parents.

Ladybug beetles chase, capture, and eat smaller insects called aphids.Which best describes this relationship?

Which occurs during both DNA replication and protein production?

Which is an example of an environmental influence that would most likely result in natural selection?

Rosa records the distance that a toy car rolls and the time it takes to cover the distance.What scientific practice is this?

After reading a book about parrots, Tani wants to learn more about them. Which question could be answered through scientific investigation?

Why are scientists most likely working on developing cleaner-burning fuel for cars?

Which is the best example of a question that could be used to develop a testable hypothesis?

A local plant nursery uses large sprinklers to water the plants twice a day. The water contains phosphorus, which is a fertilizer that helps plants grow. Some of the water becomes runoff and ends up in nearby streams and lakes.

The diagram shows a shell fossil.

The diagram shows an energy pyramid.

Which is the most likely reason why scientists change a model?

Nico is reading an article about two fossils that appear to have a common ancestor. Fossil X has a much more complex bone structure than fossil Y.What does this most likely suggest about the fossils?

Janelle thinks that genetic engineering could be used to make a larger fruit rather than cloning the fruit.

Which causes an increase in greenhouse gases?

Pluto was once classified as a planet. However, scientists no longer classify Pluto as a planet. Which is a likely reason for this change?

Clem is homozygous for earlobe type.What does this mean?

A gardener wants to grow plants with large purple flowers. She crosses two parent plants that have large purple flowers in order to produce the desired trait in the offspring.

What is 5.27 × 10–4 written in standard form?

Assuming the bull’s eye is the accepted value, which diagram shows results that are accurate and precise?

Why is it important that scientists conduct multiple observations during an experiment?

Which statement is correct about the differences between theories and laws?

Bipalium kewense is a species of flatworm that can reproduce sexually; however, instead it usually breaks into two pieces, each of which becomes a fully functioning adult.What is the main method of reproduction for these flatworms?

A teacher makes a Venn diagram to compare asexual reproduction and sexual reproduction.

Which scenario would result in a population growth of zero?Use this formula:population growth = (birth rate + immigration) – (death rate + emigration)

A rabbit is heterozygous for fur color. Black fur is dominant (B) and brown fur is recessive (b).Which describes the rabbit’s genotype and phenotype?

A bird population only eats a certain type of plant. One year, flooding washes away most of these plants in an area. What will most likely result?

Which best describes independent assortment?

Which would be the outcome in a fertilized egg if the process of meiosis did not occur?

What describes the likelihood that a given event will occur ?

In a mouse population, some mice have thicker fur than others, but there are more mice with thinner fur. The climate in which these mice live has slowly gotten colder.

Which situation is an example of a human-induced environmental change affecting a population?

Which chemicals are major contributors to ozone layer destruction? Select two answer choices.phosphorusnitrogenbrominechlorinecarbon dioxidemethane

Kayla is learning about ecology and made a study chart.Which headings best complete the chart?

Which greenhouse gas is produced by commercial refrigeration and air conditioning systems?

The diagram shows two different types of fossils from the same kind of ancient organism.

Which characteristics describe the genetic code of humans? Select three options.can help in development of effective medicationscan only help understand human geneticscan help explain genetic diseasescomposed of about 19,000 genescomposed of 23 chromosomes