Energy conversion within an animal cell would be severely limited by removal of the cell's _______

In order for nerve cells and muscle cells to function properly, they require a high concentration of potassium ions inside the cells and a high concentration of sodium ions outside the cells.

To maintain this condition, cells utilize sodium-potassium pumps embedded within their cellular membranes to move the ions against their concentration gradients.

Since the sodium-potassium pump requires an input of energy to operate, they are an example of ______.

Which of the following is primarily responsible for the coding of the amino acids used in the synthesis of cellular proteins?

Which of the following is true about DNA and RNA?

I. DNA is a nucleic acid, whereas RNA is a protein.

II. DNA stores genetic information, whereas RNA is directly involved in protein production.

III. Both DNA and RNA always contain the nitrogenous base thymine.

IV. DNA contains the sugar deoxyribose, whereas RNA contains the sugar ribose.

Each node on a cladogram represents

Which cell organelle stores water and other materials?

Which of the following best describes the way that genes, chromosomes, and DNA are related?

Which of these names the cellular process that begins with the breakdown of organic compounds (such as glucose) and continues with turning the resulting pyruvic acid into a waste product and two molecules of ATP?

This image shows and animal cell, what is the function of the cellular organelle labeled with the letter W?

Which of the segments would be complementary to the segment above during DNA replication?

GATCGT

The cell membrane serves many functions. One of the cell membrane's functions is to help the cell maintain homeostasis. Which of the following statements best supports this claim?

When a person inhales, oxygen fills tiny air sacs fills in the person's lungs. Next, the oxygen moves from those air sacs into small blood vessels that line the lungs, and then it moves into the bloodstream sot hat it can be transported around the body.

Oxygen moves by random molecular motion from the air sacs of the lungs to the blood vessels because the concentration of oxygen in the air sacs is higher than the concentration of oxygen in the blood vessels.

This movement of oxygen molecules from an area of higher concentration to an area of lower concentration is known as _____.

Which of the following is an abiotic factor int he picture?

The Earth's carbon cycle consists of the flow, cycling, and recycling of all the carbon on Earth. Every living organism's composition includes the element carbon. How does carbon become part of living organisms?

As different organisms evolved from a common ancestor, some of their body structures retained similarities even if their functions deviated. These structures are known as homologous structures.

Which of the following pairs of structures are an example of homologous structures?

According to the theory of natural selection, which of the following organisms is most likely to survive in the given environments?

Which statement describes how this ecosystem is likely to change after many years of succession?

The process of photosynthesis and cellular respiration form a continuous cycle.

During this cycle, the products from one process serve as the starting materials for the other. Which of the following materials correspond(s) to box number 4?

This diagram suggests that ...

Suppose several house flies were allowed to enter the worm bins an feed on the food scraps. Which of the following interactions would most likely occur between the house flies and the worms?

It was hypothesized that there was a maximum number of red worms that could survive in the worm bins. Is this hypothesis supported by the data in the graph?

Which of these processes produces the most ATP?

Many natural ecosystems have been destroyed by human activity. To better manage our remaining natural ecosystems, we must first understand how the ecosystems are structured. One way to do this to determine how the organisms in the the ecosystem obtain the matter and energy they need survive. The figure below shows a simplified food web.

Based on the figure, how would owls most likely respond if all the mice died out?

In certain breed of cats, having black hair is result of two dominant alleles for hair color (HH). The heterozygous genotype (Hh) produces a cat that has black and white spots. Having two recessive (hh) genes results in a white haired. The Punnett square below shows the results of cross between which two cats?

A herd of zebra eating grass includes groups of organisms from different species. These groups best exemplify

Which statement describes the diagram above?

Predators and their prey often evolve in response to one another. This is called an evolutionary arms race.

For example, many mollusk species have developed thick shells to avoid being eaten by crabs and fish. In response, crabs and fish have developed powerful jaws and claws that can break through the thick shells. As times passes, the mollusks will develop even thicker shells to compensate for the powerful jaws and claws.

A change in the genetic traits of one species in response to a genetic change in another species is known as...

Genetically-modified organisms (GMOs) have included corn crops engineered to produce a natural pesticide to kill a certain insect which would destroy the corn. The benefits include a larger corn crop, because the destructive influence of the insects is lowered. What might be one negative result of growing this specific crop?

In this diagram, what is the name of the cellular organelle labeled with the letter X?

When a sea urchin egg is removed from the ocean and placed in freshwater, the egg swells and bursts. Which of these causes water to enter the egg?

Which of the following can cause a genetic mutation in an organism's DNA?

The most light absorbed by this plant is

Most organisms can be divided into two categories-prokaryotes and eukaryotes. What is the main difference between these two categories?

Sandra examined some animal cells using a compound microscope. under normal conditions, the cells have an approximate salinity of 1M NaCl and resemble the slide shown in picture 1.

If cells are submerged in a 0.8 M NaCl solution, what will happen to the cells?

Why does an enzyme function as a catalyst in a reaction?

Which group of organisms in this food web can be described as both primary and secondary consumers?

Starfish are marine animals that live in saltwater or ocean environments. Starfish are predators and often hunt for shelled animals, such as oysters, clams, or mollusks?

Fisherman who also hunt for shelled animals find starfish to be a nuisance because they are competing for the same prey. So, anytime a fisherman pulls a starfish up in his net, he often cuts it into several pieces before returning it to the ocean. Unfortunately for the fisherman, however, this only causes starfish population to increase.

Why?

Jennifer wants to breed finches. Her first finch has a heavy beak and dark feathers, but she does not know its genotype.

If beak type and feather color are determined by two separate genes, and if heavy beak (B) and dark feathers (F) are dominant over light beak (b) and white feathers (f), then what finch should Jennifer cross her finch with to learn the most information about her finch's genotype in one generation of offspring?

Because of this animal's adaptations, it would be most successful at

Cyanobacteria, or blue-green algae, are photosynthetic bacteria that live in both aquatic and land environments. Given this description, into which of the following categories should cyanobacteria be classified?

What is the advantage of sexual reproduction over asexual reproduction in organisms?

The endosymbiotic theory proposes that mitochondria in eukaryotic cells arose from

Which of the following forms of RNA is transcribed from DNA and carries coding information to the ribosomes?

James is homozygous dominant for curly hair (CC), and his wife is heterozygous (Cc). What is the probability that their first child will also be homozygous for curly hair?

If a cat has 38 chromosomes in each of its body cells, how many chromosomes will be in each daughter cell after mitosis?