Cells
What is the smallest unit of a living organism?
A cell
Which specialized animal cell transports oxygen around the body?
Red blood cell
What does the letter S stand for in MRS GREN?
Sensitivity
What is the name for the children or babies of living organisms?
Offspring
Which group of microorganisms includes yeast and mold?
Which organelle contains DNA and controls the activities of the cell?
Nucleus
Which specialized plant cell absorbs water and minerals from the soil?
Root hair cell
A baby grows into an adult. Which characteristic of life does this demonstrate?
Growth
Which type of reproduction involves only one parent?
Asexual Reproduction
Which microorganisms are single-celled and do not have a nucleus?
Bacteria
Which organelle is responsible for photosynthesis?
Chloroplast
Which specialized animal cell carries electrical signals around the body?
Nerve cell (Neuron)
Which characteristic of life involves releasing energy from food inside cells?
Respiration
What is a dichotomous key used for?
To identify unknown organisms
Which group of microorganisms can move using cilia, flagella, or pseudopodia?
Protozoa
What is the difference between unicellular and multicellular organisms?
Unicellular: one cell. Multicellular: many cells.
Why do palisade cells contain many chloroplasts?
To absorb more light for photosynthesis
A person removes excess salts and water through sweat. Which characteristic of life is this?
Excretion
What is a species?
A group of organisms that can reproduce with one another and produce fertile offspring
Why do viruses need a host cell?
They cannot reproduce independently and must use a host cell to make more viruses.
Name three structures found in plant cells but not in typical animal cells.
Cell wall, chloroplasts, and large sap vacuole
Why do red blood cells not have a nucleus?
To leave more space for hemoglobin to carry oxygen
Name all seven characteristics of life represented by MRS GREN.
Movement, Respiration, Sensitivity, Growth, Reproduction, Excretion and Nutrition
What is an offspring produced by parents from two different species called?
Hybrid
In a food chain, what do decomposers do with dead organisms?
They break down dead matter and recycle nutrients into the environment.