In order for the fly to pass this trait on to its offspring, a change had to occur in

Step C results in the production of

Which statement best describes species E?

A function of another type of white blood cell is to

The sex of turtle offspring is most probably

Which statement regarding organisms in this food web is correct?

What will most likely happen to the action of an enzyme from the small intestine if it is placed in an environment similar to the environment in which enzyme C functions best?

Lysosomes break open during the process of digestion, releasing enzymes into the cytoplasm. Which statement may explain why the entire cell may not be digested?

Which enzyme functions best in a pH environment most similar to that of human stomach enzymes?

The number of wolves that can be supported in this environment for a long period of time is known as

The BMI for a person who is 5 feet 9 inches tall and weighs 170 pounds is between

Which statement is best supported by the graph?

Students in a different science class carried out the same experiment. The data they obtained did not support the hypothesis that increased exercise results in increased heart rate. The most scientifically sound way to deal with this situation is to

The change in heart rate that occurs between 1 and 5 minutes of exercise is an adaptation that

Which finches would be most like the ancestral finch?

Present-day cactus finches are a type of

The organisms in a pond and the physical factors influencing them best describe

Some processes that occur in a cell are listed below.

A. utilize energy

B. detect changes in the environment

C. rearrange and synthesize chemical compounds

Which processes will all living organisms use to maintain homeostasis?

Which cell structures are correctly paired with their functions?

Over the past few thousand years, humans have helped to bring about changes in many plant and animal species in order to make them more useful. Examples include strong workhorses, hunting dogs, large-eared corn, and beautiful flower varieties. These changes were primarily brought about by humans, using the process of

Certain antibacterial soaps kill 99% of the bacteria present on hands. Constant use of these soaps could be harmful over time because

Which factor would cause two specialized tissues that contain identical chromosomes to function differently?

Some variation must be present in a population in order for natural selection to take place. These variations arise from mutations in the DNA and

In a certain species of insect, some individuals have flattened white disks on their bodies that protrude and interlock, resembling an orchid flower. This adaptation provides the insect with a better opportunity to capture its prey. If environmental conditions remain unchanged, it is most likely that, in future generations, the proportion of the population with this adaptation will

Which structure is correctly paired with its function?

In a population of birds, the percentage of individuals having a certain gene changes from 20% to 60% over the span of several hundred years. This situation will most likely affect the rate of

The finite resources of Earth are often affected by increasing human consumption. These finite resources are

Which statement best describes why pathogens are harmful?

In 1996, scientists cloned the first mammal, a sheep. This technique involved the removal of the nucleus from an egg cell. The nucleus from a cell of another adult sheep was then inserted into this egg cell. Once this cell began to develop into an embryo, it was implanted into a third female sheep that later gave birth to a healthy lamb, Dolly. Which statement concerning Dolly is correct?

Which activity would most likely increase the mutation rate in a culture of bacteria being grown in a laboratory experiment?

Which two processes are responsible for keeping the percentage of atmospheric oxygen at relatively constant levels?

Chemicals that help chemical reactions occur at faster rates in living organisms are known as

The action of insulin on sugar levels in the blood helps to

An individual recovers from the common cold, which is caused by rhinovirus A. The person then becomes infected with the avian influenza virus, which causes the bird flu. Which statement best describes what will most likely happen to this person?

The wetland plant purple loosestrife was imported to North America from Europe. Since its introduction, the loosestrife has spread, which has resulted in a dramatic decline in the biological diversity of native wetland plants. A likely reason for the spread of the purple loosestrife is that it can

Deer ticks are responsible for spreading Lyme disease. This organism, which feeds on the blood of warm-blooded organisms like mice, deer, and humans, is best described as a

Years ago, an article was written titled “Medicine Chest in the Jungle.” This article most likely described the

After a building was torn down and the area was cleared, grasses began to grow in the area. Several years later, small bushes replaced the grasses. This pattern of plant growth is known as ecological

A human activity that could significantly decrease the amount of carbon dioxide in the air is

Ethanol-fueled vehicles have increased in popularity as people try to be more environmentally responsible. Ethanol can be made from corn. Some farmers are clearing forests and planting large expanses of corn to meet the rising demand. Which statement describes a likely result of this increased corn production?

Windmills that generate electricity are being built in coastal areas. The main benefit of these windmills is that they

…Unless actions are taken to slow the decline of domesticated honeybees and augment [increase] their populations with wild bees, many fruits and vegetables may disappear from the food supply, said Claire Kremen, a conservation biologist at Princeton University in New Jersey.

… The honeybee decline, which is affecting domesticated and wild bee populations around the world, is mostly the result of diseases spread as a result of mites and other parasites as well as the spraying of crops with pesticides, scientists say.…

The decrease in the honeybee population is partly due to

…Unless actions are taken to slow the decline of domesticated honeybees and augment [increase] their populations with wild bees, many fruits and vegetables may disappear from the food supply, said Claire Kremen, a conservation biologist at Princeton University in New Jersey.

… The honeybee decline, which is affecting domesticated and wild bee populations around the world, is mostly the result of diseases spread as a result of mites and other parasites as well as the spraying of crops with pesticides, scientists say.…

A decrease in honeybee populations will

…Unless actions are taken to slow the decline of domesticated honeybees and augment [increase] their populations with wild bees, many fruits and vegetables may disappear from the food supply, said Claire Kremen, a conservation biologist at Princeton University in New Jersey.

… The honeybee decline, which is affecting domesticated and wild bee populations around the world, is mostly the result of diseases spread as a result of mites and other parasites as well as the spraying of crops with pesticides, scientists say.…

Some honeybees have been able to survive the changes in their environment and reproduce. This is most likely due to

Some levels of organization in a multicellular organism are shown in the sequence below.

A → cells → tissues → B → organ systems → organism

Which terms represented by letters A and B would complete the sequence?

A student hypothesized that watching sports on television would cause viewers’ pulse rates to increase. She designed an experiment to determine the effect of watching sports on pulse rate. A group of 200 volunteers took their pulse rates and then watched their favorite sports on television. After the games, they immediately took their pulse rates again. The data collected showed that the pulse rates of some people increased, but the pulse rates of an equal number of people did not change. Although the hypothesis was not supported by the data, the hypothesis is still valuable because it