EOC Biology Quiz #3

A farmer is struggling to control the population of a certain insect on his farm. After researching population control techniques, he discovers that a particular bird is a predator of this insect. The farmer purchases a number of these birds and releases them onto his farm.

How might the farmer's action most likely have a negative impact on the ecosystem?

• The birds will increase biodiversity of native plant species.

• The birds will pollinate native species, increasing genetic variation.

• The birds will consume beneficial insects, as well as the pest insects.

• The birds will mate with native birds and create a new species.

Answer explanation

Many insects are beneficial to farmers for pollination. This introduced bird may also feed on the beneficial insects as well as the pest insects and reduce the pollination of the crop.

Students examine images of a certain species of bat commonly found in Texas. Using the bat dichotomous key, they conclude that the bat species is a Mexican free-tailed bat due to its large, round ears.

Based on the dichotomous key, in addition to the shape of the bat's ears, which other set of features should the students look for to confirm the identity of the bat?

• Solitary with a wingspan greater than 35 cm

• Solitary with a wingspan of less than 35 cm

• Colonial with a wingspan greater than 35 cm

• Colonial with a. wingspan less than 35 cm.

Answer explanation

Ask Mom to explain an easy way to answer this question.

Materials are provided to students to build models of a prokaryotic cell, a eukaryotic cell, and a virus. The materials and the structures they represent are listed in the table shown.

Which material will students use in all three models?

• Yellow paper oval

• Grey paper hexagon

• Blue yrn

• purple buttons

Answer explanation

Blue yarn represents genetic material. All prokaryotic cells, eukaryotic cells, and viruses have genetic material.

A student makes a Venn diagram to compare the functions of carbohydrates and lipids.

Which cellular function of carbohydrates and lipids should be placed in the shared section of the Venn diagram?

• Hormone production

• Structural support of cell walls

• Energy storage

• Catalyst for chemical reactions

Answer explanation

Both carbohydrates and lipids are used to store energy.

Which statement is an example of how carbon moves through a food chain as part of the carbon cycle?

• Producers release carbon dioxide, and consumers take it in.

• Producers take in carbon dioxide and consumers release it

• Producers take in carbon from the soil and they release it when they decompose

• Producers release carbon into the soil, and consumers take it in from the soil.

Answer explanation

Producers use carbon dioxide during photosynthesis and convert it into glucose. Consumers then ingest the carbon in the glucose and use that glucose during cellular respiration, releasing carbon dioxide as they exhale.

Which table correctly identifies how the plasma membrane contributes tot he maintenance of cellular homeostasis?

Answer explanation

The plasma membrane contributes to cellular homeostasis by controlling what can enter and exit the cell.

In Texas Longhorn cattle, coat coloration is an inherited trait. What is the genetic basis of coat-color variation in Texas Longhorn cattle?

• Differences in the nucleotide sequences of genes

• Differences in the numbers of chromosomes in cells

• Differences in the diets of individual cattle

• Differences in the environmental conditions of different geographic areas.

Answer explanation

The taxonomic classifications of four species of amphibians are shown.

Based on the information provided, which two species are most closely related?

• Northern cricket frog and bullfrog

• Northern leopard frog and green treefrog

• Northern cricket frog and green treefrog

• Northern leopard frog and bullfrog

Answer explanation

Students construct a graphic organizer to illustrate the different levels of biological organization.

Which term does the letter X represent in the graphic organizer?

• Cell

• Organism

• Ecosystem

• Biosphere

Answer explanation

When a new mutation occurs in a somatic dell of a sexually reproducing organism, what percentage of the individuals offspring are likely to inherit the mutation?

• 100%

• 75%

• 25%

• 0%

Answer explanation