Biology EoC

A student noticed that the freshwater plant, Elodea, produced bubbles when placed in direct light. What could the student most likely conclude?

Bubbles of oxygen were produced as a result of photosynthesis.

Which best summarizes the role of DNA in the production of proteins?

DNA contains the instructions used to make proteins.

Which statement best explains how sweating during exercise maintains homeostasis?

It regulates body temperature.

What will most likely be the result as humans move into new areas, forests are clear cut and housing developments are built?

Many organisms will lose their homes because their habitats have been destroyed.

What will most likely happen if a nonnative species is introduced into a stable ecosystem?

The native species will have to compete for resources with the nonnative species, and the ecosystem will become unbalanced.

Scientists believe that the polar bear in Alaska and the brown bear in Russia evolved from a common ancestor. Which would be responsible for this evolutionary change?

geographic isolation

During which phase of the cell cycle does most cell growth occur?

interphase

Waxes create a waterproof layer on the outside of some living organisms. To which group of organic molecules do waxes belong?

lipids

The chemical colchicine disrupts cell division. Which cell process would most likely stop if colchicine were added to a culture of human liver cells?

mitosis

Why must DNA replication have to occur before a cell can divide by mitosis?

to maintain the same number of chromosomes in the daughter cells as in the parent cell

A section of DNA has these bases: TAG CAG TAC Which mRNA sequence is produced from this DNA section?

AUC GUC AUG

This diagram represents a closed terrarium exposed to sunlight. What must happen for the carbon cycle to continue in this terrarium?

All organisms must continue to exchange gases.

Which substance do biochemists often search for in fossils to help better understand the evolutionary relationships of the organism that formed the fossil?

DNA

These diagrams show a variety of cells from the same organism. How can cells from the same organism have such different shapes and functions?

During differentiation, different parts of the DNA in each type of cell are activated, resulting in the different structure and function of the cells.

In some ecosystems, wolves have been eliminated due to their threats to humans. How can the reintroduction of wolves benefit the ecosystem?

It can eliminate weak animals from a prey population, thereby decreasing competition for natural resources.

Which effect could a mutation in mRNA have on the production of proteins?

The protein produced will have a different identity.

This diagram shows a red blood cell in a beaker that contains a solution with a higher salt concentration than that inside the red blood cell. What will happen to the red blood cell in this environment?

The red blood cell will shrink from losing water molecules.

What will most likely occur if the population of the world continues to increase at predicted rates?

There will be more rapid depletion of natural resources.

Which statement best explains why animals are considered heterotrophic?

They are able to obtain nutrients by consuming other organisms or their products.

How are mitosis and meiosis similar?

both require DNA replication

How do some chemicals increase the risk of a person getting cancer?

by causing cell mutations

Plant cells are able to produce their own food. This process happens in which structure?

chloroplast

Which process can occur in both mitosis and meiosis?

gene mutation

What is the basis for the earliest classification system of organisms?

physical characteristics

What activity most contributes to the depletion of the ozone layer?

release of CFCs

Which is a primary function of a vacuole in a cell?

storage

In nature, which type of behavior causes animals to produce aggressive displays and sounds?

territoriality

Which would be a desirable trait scientists may want to create in a transgenic plant?

the ability to resist insects

What determines the function of a specialized cell?

the active genes in the cell

What carries the instructions for making amino acids in a protein?

the nitrogen base bonding on the DNA molecule

What is the difference between the DNA of a dog and the DNA of a fly?

the sequence of nucleotides