Vocabulary
What is the smallest unit of a living thing that can carry out basic life processes?
Cell
Which cell structure acts as the control center and directs the cell's activities?
Nucleus
Similar cells working together form what?
Tissue
A lizard has a backbone. How would scientists classify it?
Vertebrae
Bacteria and archaea share two important characteristics. Are they unicellular or multicellular, and do they have a nucleus?
They are unicellular and do not have a nucleus.
What do we call a structure inside a cell that has a specific job and helps the cell carry out life processes?
Organelle
Which structure acts like a gatekeeper, controlling what materials can move into and out of a cell?
Cell membrane
Put these in order from simplest to most complex: tissue, organism, cell, organ system, organ.
Cell → Tissue → Organ → Organ System → Organism
A worm does not have a backbone. How would scientists classify it?
Invertebrate
Unlike plants, this group of organisms cannot make its own food. What group is it?
Fungi
A scientist is studying a dog, a tree, and a mushroom. What vocabulary word describes each entire living thing?
A cell needs energy to do its work. Which structure supplies that energy?
Mitochondria
A group of different tissues works together to pump blood throughout the body. What level of organization does this describe?
Organ
A plant has tubes that transport water and nutrients throughout it. What type of plant is it?
Vascular plant
I can be unicellular OR multicellular, I have a central nucleus, and not all members of my group make their own food. What am I?
A protist
A living thing produces more organisms of its own kind. What life process is taking place?
Reproduction
Which cell structure stores water, food, and wastes?
Vacuole
Several organs work together to perform a major function in the body. What level of organization do they form?
Organ system
A small plant has no vascular tissue and stays close to the ground. What type of plant is it?
Nonvascular plant
Viruses are not placed into one of the six kingdoms. Why not, and what basic life process identified in this lesson can they carry out?
They do not carry out all basic life processes; the life process identified is reproduction.
What is the green structure in a plant cell where food is made, and what is the green chemical that helps plants use sunlight to make food?
Chloroplast = structure; chlorophyll = chemical
I fill the inside of the cell and help support and protect the structures inside it. What am I?
Cytoplasm
A muscle cell and a nerve cell are part of the same organism, but they perform different jobs. Why can cells in a multicellular organism have different jobs?
Cells can specialize so the organism can function well.
Which group contains the most species of invertebrates?
Arthropods
According to cell theory, where do new cells come from?
Other cells