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Question 1

Which basic function of life is being carried out when an Amoeba surrounds and engulfs a smaller organism as food?

Nutrition, getting energy and nutrients
Excretion, removing waste from the cell
Sensitivity, detecting and responding to light
Homeostasis, keeping internal conditions stable

Question 2

Which statement about respiration is true?

Respiration only happens in organisms that have lungs and actively breathe air in and out
Respiration means releasing energy stored in food, and every single cell does it
Respiration is just another word meaning the same thing as breathing air in and out
Respiration only happens while an organism is in the process of reproducing

Question 3

A Paramecium's contractile vacuole pumps excess water out of the cell. Which basic function of life does this represent?

Growth, building materials needed to divide
Excretion, removing waste from the cell
Movement, changing position or a body part
Sensitivity, detecting the environment

Question 4

A Euglena's eyespot detects the direction light is coming from, and the cell responds by swimming toward it. Which basic function of life is this?

Sensitivity, detecting and responding to the environment
Reproduction, the process of producing offspring for the species
Nutrition, getting energy and nutrients for the cell to use
Excretion, removing waste materials from inside the cell

Question 5

Which of the four organisms moves using cilia, many short hair-like structures that beat together?

Amoeba, which uses pseudopods instead
Euglena, which uses a flagellum instead
Paramecium, which beats its cilia together
Volvox, a colony made of many flagellated cells

Question 6

Which organism moves and feeds using pseudopods, temporary false feet formed by extending part of its own body?

Volvox, a colony made of many flagellated cells
Amoeba, which flows forward using pseudopods
Euglena, which swims using a flagellum
Paramecium, which swims using cilia

Question 7

Which organism has both an eyespot and chloroplasts, letting it detect light and also photosynthesize and take in food?

Paramecium, which uses cilia and a contractile vacuole
Amoeba, which uses pseudopods and phagocytosis
Euglena, which has both an eyespot and chloroplasts
Volvox, a colony that releases daughter colonies

Question 8

An organism is a colony of hundreds of individual flagellated cells, and daughter colonies form inside it and are released. Which organism is this?

Volvox, which reproduces by releasing daughter colonies
Euglena, a single cell with an eyespot and chloroplasts for photosynthesis
Paramecium, a single cell that moves using its cilia
Amoeba, a single cell that moves using its pseudopods

Question 9

What is homeostasis?

Producing offspring, which can happen asexually with one parent or sexually with two parents
Keeping internal conditions stable enough for the other functions to keep happening
Increasing in size, or building the materials a single cell needs before it can divide
Detecting and responding to the environment, such as an eyespot responding to light

Question 10

What is the function of the cell membrane?

It holds genetic information and directs the cell
It controls what enters and exits the cell
It releases energy from food for the cell to use
It makes food for the cell using light

Question 11

Which organelle holds genetic information and directs the cell, and is absent in bacterial cells?

Mitochondria, which release energy from food
Vacuoles, which store materials and manage water
The nucleus, which holds genetic information
The cell wall, which provides structure and support

Question 12

What do mitochondria do inside a cell?

They store materials and manage the cell's water balance
They provide structure and support to the cell
They release energy from food for the cell to use
They control what enters and exits the cell

Question 13

A student looks at a cell under a microscope and sees chloroplasts. Which two organisms from this unit are the only ones with chloroplasts?

Amoeba and Paramecium, both without chloroplasts
Euglena and Volvox, the only two with chloroplasts
Paramecium and Volvox, an unlikely mismatched pair of organisms
Amoeba and Euglena, a mismatched pair

Question 14

Which combination of features describes a bacterial cell?

Nucleus and mitochondria present, no cell wall
No nucleus and no mitochondria, but has a cell wall
Nucleus, cell wall, and chloroplasts all present
Mitochondria and chloroplasts present, no cell wall

Question 15

Which structures does a plant cell have that an animal cell does not?

A nucleus and mitochondria, present in both cell types
A cell wall and chloroplasts, which an animal cell lacks
A cell membrane and vacuoles, present in both cell types
Mitochondria and a cell membrane, present in both cell types

Question 16

A microscope's eyepiece is 10x and the objective lens in use is 40x. What is the total magnification?

50x, the sum of the two lens powers
4x, the objective divided by the eyepiece
400x, the eyepiece multiplied by the objective
4000x, the eyepiece multiplied by itself and the objective

Question 17

Why should a student start with the lowest-power objective lens before switching to higher power?

The lowest power lens always gives the single clearest, sharpest possible image
It is easier to find the specimen with a wider field of view first
High power lenses can only ever be focused on slides that are already stained
Low power lenses do not need any light source to work at all

Question 18

When preparing a wet mount slide, what is the correct order and technique?

Lower the coverslip flat and drop it quickly onto a dry slide
Place the specimen and water down first, then lower the coverslip at an angle
Add the coverslip to the slide first, then try to slide the specimen underneath it
Skip the water and place the coverslip directly on the dry specimen

Question 19

A student claims to have identified Euglena under the microscope just because the cell looks green and oval. What is missing from this identification?

Nothing; a general impression of shape and color is always enough
Naming one specific visible structure, not just a general shape
Measuring the exact size of the cell down to the millimeter
Identifying the organism only by its full scientific name

Question 20

A Volvox daughter colony forms inside its parent and is released. It is genetically identical to the parent. What type of reproduction is this?

Sexual reproduction, since it produces a whole new colony
Asexual reproduction, one parent, offspring genetically identical
Sexual reproduction, since it involves the colony's cells dividing
Neither type, since colonies cannot reproduce at all

Question 21

This structure pumps out excess water to manage a cell's water balance, and is found in Amoeba and Paramecium. Which structure is this?

Contractile Vacuole
Eyespot
Flagellum
Cilia
Pseudopod

Question 22

This light-sensitive structure near the front of Euglena detects the direction light is coming from. Which structure is this?

Contractile Vacuole
Eyespot
Flagellum
Cilia
Pseudopod

Question 23

This single, long, whip-like structure is used by a cell such as Euglena to swim. Which structure is this?

Contractile Vacuole
Eyespot
Flagellum
Cilia
Pseudopod

Question 24

These many short, hair-like structures beat together for fast, controlled movement on a cell such as Paramecium. Which structure is this?

Contractile Vacuole
Eyespot
Flagellum
Cilia
Pseudopod

Question 25

This temporary, false foot forms when a cell like Amoeba extends part of its own body to move or feed. Which structure is this?

Contractile Vacuole
Eyespot
Flagellum
Cilia
Pseudopod

Science 7 Unit 1 Test: Single-Celled Organisms, Organelles, Reproduction

Unit Test