STEMscopes

What is a mutation?

• A temporary change in the sequence of the DNA inside a cell

• A permanent change in the sequence of the DNA inside a cell

• A virus that attacks the DNA inside a cell

• Bacteria that attack the DNA inside a cell

Tags

NGSS.MS-LS3-1

What happens when the genetic code in a gene is altered?

• This situation has never occurred

• A defective protein is produced, causing a mutation.

• The genetic code is corrected by the lysosomes.

• Nothing changes; the correct proteins are still made.

Tags

NGSS.MS-LS3-1

Which of the following has a nucleus and membrane bound organelles?

• prokaryotic

• eukaryotic

• organism

• unicellular

What is evidence that shows that humans are made of different types of cells?

• Samples from the human all had cells.

• A heart cell has different structures and functions than a skin cell.

• Humans have a lot of cells.

• One cell has many parts.

Tags

NGSS.MS-LS1-1

What's the relationship between cells and living things?

• Living things can be made of one or more cells.

• The bigger the organism, the bigger the cells.

• Smaller organisms have more more organelles than larger organisms.

• All cells are the same in all living things.

Tags

NGSS.MS-LS1-1

NGSS.MS-LS1-3

Which of the following is NOT a characteristic of living things?

• Made of cells

• Reproduce and grow

• Cannot evolve

• Has a metabolism

Answer explanation

The correct choice is 'Cannot evolve' because all living things have the ability to evolve over time. The other options—being made of cells, reproducing, and having metabolism—are essential characteristics of life.

Tags

NGSS.MS-LS4-4

Which of the following is a characteristic of non-living things?

• Made of cells

• Can reproduce and grow

• Cannot evolve

• Has a metabolism

Answer explanation

Non-living things cannot evolve, as evolution requires reproduction and adaptation over generations. In contrast, living things are made of cells, can reproduce, and have metabolism.

What evidence shows that humans are made of different types of cells?

• Samples from humans all had cells.

• A heart cell has different structures and functions than a skin cell.

• Humans have a lot of cells.

• One cell has many parts.

Answer explanation

The correct choice highlights that a heart cell and a skin cell have distinct structures and functions, demonstrating the diversity of cell types in humans. This variation is key evidence of different cell types.

Tags

NGSS.MS-LS1-1

Can a prokaryotic organism be alive without a nucleus?

• True

• False

Answer explanation

True. Prokaryotic organisms, such as bacteria, do not have a nucleus. They are single-celled and can carry out all life processes without a membrane-bound nucleus, demonstrating that life can exist without this structure.

A genetic characteristic that allows an organism to survive and reproduce.

• natural selection

• adaptation

• hibernation

• selective breeding

• hybridization

Tags

NGSS.MS-LS1-4

NGSS.MS-LS4-4