In what year did Mathias Schleiden conduct early studies of cells?

Who conducted early studies of cells in 1839?

Who proposed the Cell Theory?

Fill in the blank: Cells were first observed using a microscope in ____ by Robert Hooke.

Which image shows the drawing by Hooke?

Cell Theory contains the following three principals: 1. ________ are composed of cells. 2. Cells are the ________ living things. 3. Cells arise only from ________ cells. Fill in the blanks with the correct words from the Cell Theory principles.

According to Cell Theory, what are all organisms composed of?

According to Cell Theory, cells arise only from ________.

Which organelle is found only in plants among the eukaryotes?

What is diffusion? Fill in the blank: Diffusion is when molecules move from areas of _______ concentration to _______ concentration, essential for transporting nutrients, gases, and waste.

According to the information provided, what happens to the efficiency of diffusion as cell size increases?

According to the passage, cells rely on ______ to move substances (such as oxygen, nutrients, and waste) in and out of the cell.

Which of the following is NOT a factor that affects the rate of diffusion?

The rate of diffusion is affected by surface area available.

One factor that affects the rate of diffusion in cells is:

Which of the following is the surface where materials enter and exit a cell?

Larger cells have less _______ relative to their volume, slowing diffusion.

What happens to the rate of diffusion when the temperature increases?

Lower temperatures cause molecules to move slower, reducing diffusion.

The speed at which molecules diffuse in and out of a cell depends on which of the following factors?

What is the advantage of small cell size according to the surface area-to-volume ratio?

If the radii of two cells differ by a factor of 10, how many times greater will the surface area of the larger cell be compared to the smaller cell?

If the radii of two cells differ by a factor of 10, how many times greater will the volume of the larger cell be compared to the smaller cell?

Based on the table, what is the surface area of a cell with a radius of 10 units?

As the cell radius increases, the surface area to volume ratio increases.

An organism made of many ______ cells has an advantage over an organism composed of fewer, larger cells.

As a cell’s size increases, its surface area increases much more rapidly than its volume.

Some cells overcome limitation by being ______ and ______ – like neurons.

Which of the following statements is true about the concentration gradient of the diffusing substance?

Fill in the blank: If the concentration gradient is small, diffusion is _______.

Which type of cells allow molecules to diffuse across short distances, so nutrients and oxygen reach organelles quickly?

Fill in the blank: Larger cells have greater distances to cover, which _______ diffusion.

Which type of cell has a high surface area-to-volume ratio, allowing for efficient diffusion and transport?

Diffusion is faster in which type of cell because molecules have a shorter distance to travel?

Nutrient and waste exchange is more efficient in small cells because the membrane has more surface area relative to volume.

Fill in the blank: Large cells have ______ energy demands due to larger volume and metabolic activity.

What adaptation might large cells have to compensate for their size?

What is the main reason why most cells are small?

Large cells have developed ________ to improve transport efficiency and maintain proper function.

Large cells become long and narrow to:

Fill in the blank: Large cells reduce the distance nutrients and signals must travel by becoming ______ and ______.

Which of the following is a benefit of large cells being long and narrow?

Neurons (nerve cells) are extremely long (up to 1 meter in humans). Instead of being bulky, neurons are thin, ensuring quick diffusion of oxygen, nutrients, and waste.

This shape allows electrical signals to travel quickly across the body. What cell type is being described?

According to the passage, most cells are:

Fill in the blank: Resolution is the minimum distance two points can be apart and still be distinguished as _________

If two objects are too close together, they may appear as one blurry object. Resolution improves when the microscope can distinguish the two objects as _________

Objects must be _______ μm apart for the naked eye to resolve them as two objects rather than one.

According to the diagram 'The Length Scale of Biology', which of the following is the smallest structure?

According to the diagram 'The Length Scale of Biology', what is the approximate size of a DNA molecule?

According to the diagram 'The Length Scale of Biology', which of the following can be seen using conventional light microscopy?

According to the diagram 'The Length Scale of Biology', which method would you use to observe a virus?

According to the diagram 'The Length Scale of Biology', which of the following is larger: a plant cell or a mitochondrion?

According to the diagram 'The Length Scale of Biology', which of the following can be seen with the human eye?

According to the diagram 'The Length Scale of Biology', what is the approximate size of a human red blood cell?

Which type of microscope uses magnifying lenses with visible light?

What is the minimum distance that light microscopes can resolve structures apart?

Light microscopes are limited to resolution using _____

Which type of microscope uses a beam of electrons?

Electron microscopes can resolve structures that are _____ nm apart.

Transmission electron microscopes transmit electrons through the material.

Scanning electron microscopes beam electrons onto the specimen surface.

Fill in the blank: The region or organelle where DNA is located in a cell is called the ________.

Fill in the blank: The semifluid matrix of organelles and cytosol in a cell is called the ________.

Fill in the blank: The organelles that synthesize proteins in a cell are called ________.

Fill in the blank: The phospholipid bilayer that surrounds the cell is called the ________.

Which of the following are the two domains of prokaryotes?

Prokaryotic cells ______ a membrane-bound nucleus.

What type of DNA is present in the nucleoid of prokaryotic cells?

Prokaryotic cells have a cell wall outside of the plasma membrane.

Prokaryotic cells have ribosomes.

Prokaryotic cells are the ______ organisms.

Are there any organelles common to all prokaryotes?

What is the function of magnetosomes in certain bacteria?

Magnetosomes contain ________ crystals that allow the cell to align with a magnetic field.

Certain bacteria can align with Earth's magnetic field, helping them navigate toward ________ conditions.

Prokaryotes may also have infoldings of the ________ that aggregate reactions.

What are Bacterial Microcompartments (BMCs) bounded by?

Which of the following is a function of Bacterial Microcompartments (BMCs)?

Bacterial Microcompartments (BMCs) are functional but not structural analogs of eukaryotic organelles.

Unlike eukaryotic organelles, Bacterial Microcompartments (BMCs) are ________-based compartments that lack a ________ membrane and specialize in ________ processes.

Bacterial Microcompartments (BMCs) function like organelles but lack a lipid membrane.

Which molecules related to actin and tubulin do prokaryotes possess?

What is the result of removing MreB from a prokaryotic cell?

The strength and shape of a prokaryotic cell is still determined by the _________.

Which of the following is a characteristic of prokaryotic cells?

What are most bacterial cell walls composed of?

What is the main function of bacterial cell walls?

Fill in the blank: The cell walls of plants, fungi, and most protists are ________ from those of bacteria.

Susceptibility of bacteria to antibiotics often depends on the structure of their cell walls.

Which of the following do Archaean cell walls lack?

Fill in the blank: Membrane lipid structure helps to distinguish ______ from bacteria.

The lipid in archaeal membranes contains saturated hydrocarbons that are covalently attached to glycerol at both ends.

How do archaea differ from bacteria in terms of cell wall and membrane structure?

What allows archaea to thrive in extreme conditions?