Aiden observed an organism under his microscope and found that it is made of only one cell. What should Aiden call this organism?

The combination of chemical reactions through

which an organism builds up or breaks down

materials as it carries out its life processes is called ...

Maintaining a stable internal

environment is called

James, Elijah, and Evelyn went for a winter hike. As they stepped out into the freezing weather, their bodies started to shiver in order to maintain their internal body temperature at 98.6F. Which characteristic of life does this represent?

Green plants produce their own food through the process of photosynthesis. Which characteristic of life does this represent?

Grace and Nora were observing a nest in their backyard. A baby songbird hatched from its egg while both parent songbirds were watching. According to this scenario, which characteristic of life does this represent?

A camel has eyelashes that work to keep the dust and sand out of its eyes. Which characteristic of life does this represent?

Mia, Aiden, and Olivia are discussing about homeostasis. Aiden says it's about adapting to your environment, Olivia thinks it's the sum of all of your chemical reactions, and Mia believes it's being composed of more than one cell. However, their teacher corrects them and says it's something else. What did their teacher say?

Which of the following is a stimulus?

Oliver, Jackson, and Abigail are in a science lab. Oliver shines a flashlight into Jackson's eye, Abigail pops a rubber band on her hand, and Jackson's pupils constrict when exposed to bright light. Which of these is a response?

Over three years, Tim's height has increased from 5'4" to 5'11". Which characteristic of life does this represent?

An adult hydra is producing its offspring through budding. Which characteristic of life does this represent?

Over many hundreds of years, a population of rabbits living in the woods adapts to its surrounding with brown fur. Which characteristic of life does this represent?

Liam, Avery, and Elijah are having a debate. They are trying to determine which element must be present in a substance for it to be considered "Organic" or alive. What do you think?

In a science experiment, Olivia and Benjamin are studying how enzymes work. What is the purpose  of an enzyme?

Benjamin is studying how enzymes work in the body. He learns that enzymes bind to a specific molecule to catalyze a reaction. Letter B represents the molecule that the enzyme binds to. What is this molecule called?

Jackson is studying how enzymes work in the human body. He learns that enzymes bind to a specific part of the molecule they act on. What is this part called?

Henry is studying how enzymes work in the body. He learns that the letter E represents a specific component in the process. What does the letter E stand for?

Liam and Abigail are working on a science project. They learn that enzymes provide a site where reactants called substrates can be brought together in an enzyme-catalyzed reaction. The site is called the

Jackson is trying to unlock a special box that only opens with a specific key. Each key only fits one lock.  What is this concept called?

During a science experiment, Scarlett and Arjun measured the activity of an enzyme at different temperatures. Based on the graph, what is the optimal temperature for this enzyme? 

Henry is conducting an experiment in his biology class. He learns that an enzyme speeds up a chemical reaction in the cell but can only be used once.  True or False? 

In a lab experiment, Noah observes that an enzyme's activity decreases at very high temperatures. What is the most likely reason for this decrease?

Olivia is studying the effect of pH on enzyme activity. She finds that the enzyme works best at a pH of 7. What is this pH level called?

Cell membranes are described as selectively permeable.

Four students were asked to explain what this means. Which one is correct?

Which part of the cell controls the movement of substances?

All of the following are functions of a cell membrane EXCEPT

In the cell membrane model demonstration, why were iodine molecules able to enter the bag but the starch molecules were not able to leave the bag?

Which characteristic of a cell membrane allows it to control materials entering and leaving a cell?

A child with cystic fibrosis has an altered protein in his cells that stops chloride ions from leaving the cells. This protein most likely affects the functioning of

Explain how the fluid mosaic model of the cell membrane supports its function in regulating the internal environment of the cell. Consider the arrangement and movement of molecules within the membrane.

Plant and animal cells are examples of

Which of the following structures is ALWAYS found in both eukaryotic and prokaryotic cells?

Bacteria is an example of a(n)

CHALLENGE QUESTION: Which of the following provides evidence for the hypothesis that prokaryotes evolved before eukaryotes.

Which type of cell is this?

This organelle controls what goes in and out of plant and animal cells.

The _____________ stores food, water, wastes, and other materials in both plant and animal cells.

The _____________ is a gel-like fluid that fills plant and animal cells. It holds the organelles in place and gives each cell its shape.

What organelle is made of a phospholipid bilayer with embedded proteins?

This organelle could be compared to a window screen, because it lets some materials move in and out freely, while others cannot pass through.

This organelle is made of cellulose, a type of carbohydrate.

This organelle could be compared to a closet because it is responsible for storing materials for the cell.

Plants have one large of these; while animal cells have many small ones.

What can only be found in plant cells?

What is the function of a chloroplast?

cell with no membrane bound structures and no

nucleus

cell with membrane bound organelles and a

nucleus

structure that packages and modifies proteins

Name two organelles that are only found in plant cells.

All of these statements are part of cell theory, EXCEPT

The liver is an organ that removes and breaks down waste materials from the blood. Which of the following organelles would be found in a higher-than-normal frequency in liver cells?

The hallways at school provide a way of transporting students from class to class. Which organelle performs a similar function?

Which type of solution makes a cell shrink?

What type of transport is shown in the diagram?

What type of transport is shown in the diagram?

What type of transport is shown in the diagram?

Which of the following are examples of passive transport? Select multiple answers.

Which correctly points to the part of the image that is hydrophobic?

You are alone on an island in the middle of the Atlantic Ocean. You are hot and thirsty, so you want to drink water from the ocean. You think about biology class and you decide:

Why has water moved into the cell in the hypotonic solution?

Transport of water molecules across a cell membrane allows cells to maintain stable internal conditions in an ever-changing environment. This stable internal condition is called _____.

A red blood cell is placed into a solution. The red blood cell has a lower concentration of protein and sugar than the solution, as shown in the diagram. What is most likely to occur?

_____ and _____ are organelles that arose from endosymbiosis

Which of the following is evidence to support the endosymbiotic theory?

The Endosymbiotic Theory explains