Which of the following environments is most likely to have cold, windy weather and a relatively low amount of available oxygen?

In a living organism, what is an organ?

The following diagram represents how energy flows through ecosystems:

sunlight>plants>herbivores>carnivores

What would most likely occur in an ecosystem if a nearby volcano erupted and filled the sky with dust particles, which caused significantly less sunlight to reach the ecosystem over the course of a year?

The _______________ biome is the largest on Earth.

The ___________ is a membrane-bound organelle that contains an organism's genetic material and helps control and regulate cellular processes.

As a bee feeds upon the nectar produced by a flower, the bee may become coated with the flower's pollen. As the bee flies from flower to flower, some of this pollen may contact a flower's pistil, resulting in pollination.

This relationship between the bee and the flower is an example of ____________________.

In a living organism, what is a tissue?

The offspring of a sexually-reproducing organism receives

A biome that experiences the seasons of winter, spring, summer, and fall, and non-extreme temperatures is likely to be a(n) ______________ biome.

A ___________ is a rigid layer that surrounds a plant cell, providing structural support.

_______________ is the largest continental biome. It experiences long, cold winters, short, mild summers; and low precipitation. It is characterized by coniferous forests.

Janet is studying a population of genetically-identical individuals. Janet can conclude that these organisms

Select the choice that best completes the following sentence: ______ reproduction requires one parent, while _________ reproduction requires two parents.

A particular species of lizard lives underground for much of the day, escaping the heat. The species of lizard probably lives in a _______________.

Select the choice that best completes the following sentence: Asexual reproduction produces offspring that are genetically ________ to the parent.

What are the most basic building block of all organisms.

Which biome is found near the polar ice caps?

An organism that feeds upon producers is known as a _________.

Which of the following types of organelles are most important in providing a cell with energy?

Which of the following bodies of water are included in the freshwater biome?

I. rivers

II. oceans

III. lakes

IV. streams

Select the choice that best completes the following sentence. Sexual reproduction produces offspring that are genetically __________ to the parents.

An organism that feeds upon primary consumers is known as a ____________.

A flea between live on the skin of a dog and feed on the dog's blood. This relationship between the flea and the dog is an example of ______.

Decomposers are organisms that

In which cell organelle does photosynthesis take place?

Which of the following is true about the marine biome?

An estuary is

Organisms living in an ecosystem depend on the ecosystems abiotic factors to survive. Which of the following could be considered an abiotic factor?

In a cell, what is the function of the cell membrane?

A _______ is a membrane-bound sac found in cells that contains digestive enzymes which break down complex molecules or structures.

Which cell organelle is where proteins are made?

What is the function of a vesicle, sometimes called a vacuole, in an animal cell?

Brian lives in a biome that is very similar to a grassland. Trees spot the landscape of this biome. This biome has seasonal rains and stays warn year-round. What kind of biome does Brian most likely live in?

Which of the following statements is true?

A partially-enclosed coastal region where sea water mixes with freshwater is called _____________.

A bird builds its nest on the branch of a tree. This relationship between the bird and the tree is an examples of _________.

Where is the tropical rainforest biome found?

All ecosystems contain at least one population of organisms. Which of the following could be considered a population?

During the process of diffusion,

Cellular respiration is the process by which

Photosynthesis allows

Diffusion allows materials to

A cell does not need to use energy during

When water diffuses into or out of a cell, it is called