Chapter 5: Levels of Organization in Living Things

Question 1

The smallest unit of matter is the ________.

Answer 1

atom

Question 2

A group of atoms bonded together is called a ________.

Answer 2

molecule

Question 3

The basic unit of life is the ________.

Answer 3

cell

Question 4

Tissues are made up of similar ________ working together.

Answer 4

cells

Question 5

An organ is made up of two or more types of ________.

Answer 5

tissues

Question 6

A group of organs working together forms an ________ ________.

Answer 6

organ system

Question 7

The highest level of organization in living things is the ________.

Answer 7

organism

Question 8

Water is made of two hydrogen atoms and one ________ atom.

Answer 8

oxygen

Question 9

Proteins, lipids, and carbohydrates are all types of biological ________.

Answer 9

molecules

Question 10

Cells that do not have a nucleus are called ________ cells.

Answer 10

prokaryotic

Question 11

Cells that do have a nucleus are called ________ cells.

Answer 11

eukaryotic

Question 12

Muscle tissue helps the body to ________.

Answer 12

move

Question 13

Nervous tissue is responsible for sending and receiving ________.

Answer 13

signals

Question 14

Epithelial tissue covers and ________ surfaces.

Answer 14

protects

Question 15

Connective tissue provides ________ and support.

Answer 15

structure

Question 16

In plants, ________ tissue carries water and nutrients.

Answer 16

vascular

Question 17

The outer protective layer in plants is called ________ tissue.

Answer 17

dermal

Question 18

The system responsible for breathing in humans is the ________ system.

Answer 18

respiratory

Question 19

The system that transports blood is the ________ system.

Answer 19

circulatory

Question 20

The brain and spinal cord are part of the ________ system.

Answer 20

nervous

Question 21

The largest organ in the human body is the ________.

Answer 21

skin

Question 22

The shoot system in plants includes leaves, stems, and ________.

Answer 22

flowers

Question 23

The root system in plants ________ the plant and absorbs water.

Answer 23

anchors

Question 24

DNA is an example of a ________ acid.

Answer 24

nucleic

Question 25

All living things follow the same pattern of biological ________.

Answer 25

organization

Question 26

Which of the following is the correct order of biological organization from smallest to largest? A. Atom → Molecule → Cell → Tissue → Organ → Organ System → Organism B. Cell → Atom → Molecule → Tissue → Organ C. Molecule → Atom → Organ → Organ System → Organism → Cell D. Organism → Organ System → Organ → Tissue → Cell

Answer 26

A. Atom → Molecule → Cell → Tissue → Organ → Organ System → Organism Explanation: This is the correct sequence of biological organization in living things.

Question 27

What is the basic unit of life? A. Atom B. Molecule C. Cell D. Tissue

Answer 27

C. Cell Explanation: Cells are the smallest units that carry out all life processes.

Question 28

Which type of tissue sends signals throughout the body? A. Muscle B. Connective C. Epithelial D. Nervous

Answer 28

D. Nervous Explanation: Nervous tissue sends and receives electrical signals.

Question 29

What makes up tissues? A. Organs B. Organ systems C. Cells D. Molecules

Answer 29

C. Cells Explanation: Tissues are made of similar cells working together.

Question 30

Which organ system includes the heart and blood vessels? A. Respiratory B. Digestive C. Circulatory D. Nervous

Answer 30

C. Circulatory Explanation: The circulatory system transports blood throughout the body.

Question 31

What kind of cells lack a nucleus? A. Prokaryotic B. Eukaryotic C. Animal D. Plant

Answer 31

A. Prokaryotic Explanation: Prokaryotic cells, such as bacteria, do not have a nucleus.

Question 32

Which type of plant tissue transports water? A. Dermal B. Ground C. Vascular D. Epithelial

Answer 32

C. Vascular Explanation: Vascular tissue (like xylem) carries water and nutrients.

Question 33

What organ controls the body and processes information? A. Heart B. Brain C. Stomach D. Lung

Answer 33

B. Brain Explanation: The brain is the control center of the nervous system.

Question 34

Which type of tissue lines and protects the body? A. Muscle B. Connective C. Epithelial D. Nervous

Answer 34

C. Epithelial Explanation: Epithelial tissue covers surfaces and protects them.

Question 35

Which of the following is an organ? A. Heart B. Blood C. Cell D. Neuron

Answer 35

A. Heart Explanation: The heart is an organ made of different types of tissues.

Question 36

Which molecule carries genetic information? A. Protein B. DNA C. Lipid D. Carbohydrate

Answer 36

B. DNA Explanation: DNA is a nucleic acid that holds genetic instructions.

Question 37

What is the job of connective tissue? A. Move the body B. Send signals C. Store nutrients D. Support and bind parts

Answer 37

D. Support and bind parts Explanation: Connective tissue provides structure and holds parts together.

Question 38

Which system breaks down food into nutrients? A. Digestive B. Respiratory C. Circulatory D. Nervous

Answer 38

A. Digestive Explanation: The digestive system digests food and absorbs nutrients.

Question 39

What level comes directly before tissue in the hierarchy? A. Organ B. Organ System C. Cell D. Molecule

Answer 39

C. Cell Explanation: Cells group together to form tissues.

Question 40

Which part of a plant helps anchor it into the ground? A. Leaf B. Stem C. Root D. Flower

Answer 40

C. Root Explanation: Roots hold the plant in place and absorb water.

Question 41

The largest organ in the human body is the: A. Heart B. Liver C. Skin D. Lung

Answer 41

C. Skin Explanation: The skin is the body's largest organ.

Question 42

Which of the following is NOT a tissue type? A. Epithelial B. Connective C. Neural D. Muscle

Answer 42

C. Neural Explanation: Neural is not a tissue type; the correct term is nervous tissue.

Question 43

Which system includes the lungs? A. Digestive B. Respiratory C. Nervous D. Skeletal

Answer 43

B. Respiratory Explanation: The respiratory system allows us to breathe.

Question 44

What level of organization comes right after organs? A. Tissues B. Cells C. Organ Systems D. Atoms

Answer 44

C. Organ Systems Explanation: Organs work together to form organ systems.

Question 45

What are the basic building blocks of molecules? A. Cells B. Atoms C. Tissues D. Proteins

Answer 45

B. Atoms Explanation: Atoms are the smallest units of matter and make up molecules.

Question 46

What type of tissue allows your body to move? A. Connective B. Nervous C. Epithelial D. Muscle

Answer 46

D. Muscle Explanation: Muscle tissue contracts to create movement.

Question 47

Where is dermal tissue found? A. Inside bones B. Covering plants C. In muscles D. In the brain

Answer 47

B. Covering plants Explanation: Dermal tissue protects the outer surface of plants.

Question 48

Which structure is found in both plant and animal cells? A. Chloroplast B. Cell wall C. Nucleus D. Vacuole

Answer 48

C. Nucleus Explanation: The nucleus is found in both plant and animal cells.

Question 49

Which is an example of an organ system? A. Leaf B. Heart C. Circulatory system D. Lung

Answer 49

C. Circulatory system Explanation: The circulatory system is made up of several organs working together.

Question 50

What do tissues combine to form? A. Cells B. Molecules C. Organs D. Organ systems

Answer 50

C. Organs Explanation: Tissues group together to form organs.