Unit 4 - Cells and microorganisms

Isla, Arjun, and Anika are discussing about microorganisms in their science class. They came up with different statements. Which of the following statements is correct concerning microorganisms?

• Isla says: 'All microorganisms are harmful to larger organisms.'

• Arjun says: 'Microorganisms can be seen with the naked eye.'

• Anika says: 'Some microorganisms are harmful but some microorganisms are helpful to larger organisms.'

• Isla says: 'All microorganisms are helpful to larger organisms.'

Kenderick wanted to see what his skin cells looked like but Damond'Tae told him he would need to use a microscope. Why did Damond'Tae tell Kenderick he would need a microscope to see the cells?

• His skin cells are too dark to be seen without a microscope

• His skin cells move too fast to be seen without a microscope

• His skin cells are too large to be seen without a microscope

• His skin cells are too small to be seen without a microscope

Mia, Emma, and Michael are studying biology. They are discussing about cells. Mia says that both plant and animal cells have a nucleus. Emma says that only plant cells have cell membranes. Michael says that only animal cells have chloroplasts. Another student says that only animal cells have cell walls. Who is correct?

• Mia is correct: Nucleus is found in plant and animal cells

• Emma is correct: Cell membranes are only found in plant cells

• Michael is correct: Chloroplasts are only found in animal cells

• The other student is correct: Cell walls are only found in animal cells

Elijah, Benjamin, and Jackson are helping their friend Semaj with a school project. They are making models of a plant cell and an animal cell. Which of the following components should they include only in one of the models?

• Nucleus

• Chloroplasts

• Cell Membrane

• Cytoplasm

During a science class, Olivia and Mason were using a microscope to examine different types of cells. They noticed one cell had a rectangular shape. Zoe, their classmate, asked them what type of cell they were most likely looking at. What should their answer be?

• Virus

• Animal

• Fungi

• Plant

David, Elijah, and Nora are studying cells in their biology class. All of the following statements they discussed are true EXCEPT...

• David mentioned that the cell membrane decides what can enter and exit the cell

• Elijah pointed out that the nucleus holds DNA and is the control center of the cell

• Nora stated that the chloroplast is a jellylike substance that floats organelles

• They all agreed that the cell wall adds structure and shape to support the cell

Michael, Anika, and Emma are studying cells in their biology class. They are trying to identify a feature that all cells, regardless of type, share. Which of the following features do all cells have in common?

• Cell membrane

• Cell wall

• Chloroplasts

• Round shape

Evelyn, Luna, and Abigail are discussing about microorganisms in their biology class. They came across some facts. Which of the following is NOT true about microorganisms?

• Evelyn mentioned that some bacteria can cause humans to get sick if they do not cook their food properly

• Luna pointed out that some bacteria can be helpful because it lives in the gut and assist with digestion

• Abigail said that some fungi can be helpful because it makes food like cheeses

• They read in their textbook that some microorganisms can be beneficial because they cause things like strep throat, food poisoning, and ear infections.

Henry, Ethan, and Zoe are studying the major differences between plant and animal cells for their biology project. They came across a statement and want to verify its accuracy. Which of the following explains a major difference between plant and animal cells?

• Henry thinks that plant cells are round but animal cells are rectangular because animal cells contain cell walls

• Ethan believes that plant cells have a nucleus but animal cells do not

• Zoe suggests that animal cells have cell membranes but plant cells do not have cell membranes because they have cell walls

• They read in a book that plant cells have chloroplasts because they make their own food but animal cells do not have chloroplasts because they cannot make their own food

Jackson, Sophia, and Benjamin are studying biology. They are discussing the basic building block of living organisms. Which of the following do they agree on?

• cell 

• organelle

• nucleus

• organ system