Cells and Life Review

What are two nonliving things in this environment?

• sunlight, grass

• trees, rocks

• rocks, water

• lily pads, trees

Answer explanation

In this environment, rocks and water are nonliving things. Sunlight is energy, grass and trees are living organisms, and lily pads are also plants, making rocks and water the correct choice.

a living thing

• Unicellular

• Organism

• Behavior

• Multicellular

Answer explanation

An 'organism' is defined as a living thing, encompassing both unicellular and multicellular forms. The other options, 'behavior' and 'unicellular/multicellular', describe characteristics or types but do not define a living thing.

the smallest part of a living thing that can carry out all the processes of life

• Respiratory System

• Organism

• Trait

• Cell

Answer explanation

The smallest part of a living thing that can carry out all life processes is a cell. Cells are the basic building blocks of life, unlike the respiratory system, organism, or trait, which are larger or different concepts.

an organism made up of only one cell

• Unicellular

• Acquired Trait

• Multicellular

• Organism

Answer explanation

An organism made up of only one cell is called unicellular. This term specifically refers to single-celled organisms, distinguishing them from multicellular organisms, which consist of multiple cells.

an organism made up of more than one cell

• Unicellular

• Skeletal System

• Multicellular

• Learned Behavior

Answer explanation

The term 'multicellular' refers to organisms composed of more than one cell, distinguishing them from 'unicellular' organisms, which consist of a single cell. Therefore, 'multicellular' is the correct answer.

What does multicellular mean?

• One cell

• Nonliving

• Many cells

• Living

Answer explanation

Multicellular refers to organisms that are composed of many cells, distinguishing them from unicellular organisms, which consist of only one cell. Therefore, the correct answer is 'Many cells'.

What is the correct order of how our body system is organized?

• organs, cells, tissues, systems

• systems, organs, cells, tissues

• cells, tissues, organs, systems

• tissues, cells, organs, systems

Answer explanation

The correct order of body organization is from the smallest unit to the largest: cells form tissues, tissues make up organs, and organs work together in systems. Thus, the right sequence is cells, tissues, organs, systems.

Cells working with other similar cells are called _______.

• systems

• veins

• organs

• tissues

Answer explanation

Cells that work together to perform a specific function are called tissues. Tissues are groups of similar cells, while organs are made up of different types of tissues working together.

When systems work together like they should, plants and animals are able to _____________ and reproduce.

• live

• sleep

• grow

• travel

Answer explanation

The correct choice is 'grow' because when systems function properly, they provide the necessary conditions for plants and animals to develop and reproduce, which is essential for their survival.

5. Based on this image is the Euglena multicellular or unicellular?

• 1. Multicellular

• 2. Unicellular

Answer explanation

Euglena is a single-celled organism, classified as unicellular. It consists of one cell that performs all necessary functions for life, distinguishing it from multicellular organisms, which are made up of multiple cells.