7th Grade Microbiology Unit Pre-Assessment
Euglenas are capable of heterotrophic behavior. How does a euglena differ from an amoeba in the way it gathers food?
A euglena takes food in through its gullet and deposits it into a food vacuole.
How do a paramecium and an amoeba obtain food to live?
A paramecium collects food into an oral groove, while an amoeba uses pseudopods to surround food.
A euglena cell has a structure called an eyespot that detects light. A paramecium does not have an eyespot, and so it cannot detect light. Why doesn't a paramecium need an eyespot?
A paramecium does not photosynthesize its own food.
A paramecium and an amoeba are shown. An amoeba eats by surrounding its food with its body. How does a paramecium eat differently than an amoeba?
A paramecium sweeps food into its oral groove.
A student used the dimmest setting on a light microscope to observe a euglena and an amoeba. The student shined a narrow beam of light at the top of the cover slip. She observed that the euglena swam up toward the light but the amoeba did not. She knew the amoeba was alive because it slowly changed shape while she watched. What inference should the student draw from her observation?
An amoeba is unable to respond to light.
All organisms process nutrients. Which sentence BEST describes how plants and animals process nutrients similarly?
Cells break down nutrients into usable forms.
Tina observed a cell under a microscope. She concluded that it was a plant cell instead of an animal cell. Which structure helped her come to this conclusion?
She saw a chloroplast, which animal cells lack.
How does the cell wall of a plant cell compare to the plasma membrane of an animal cell?
The cell wall provides structure and support; the plasma membrane controls the substances that enter and leave the cell.
The volvox is a type of green alga that lives in freshwater ponds. Each spherical alga is actually a colony consisting of up to 20,000 cells. A colony of volvox behaves like one single organism, with an anterior and posterior end. In one of the regions, the eyespots are more developed. This helps the colony swim toward a light source. How is the volvox similar to a multicellular organism?
The individual groups of cells within the colony perform different functions.
Which characteristic does a euglena share with an amoeba?
They reproduce by mitosis.
Look at the diagram modeling some parts of a plant cell. Which organelle found in this cell is responsponsible for releasing energy ?
a mitochondrion
Look at the diagram. What does the diagram model?
a plant cell
Which function makes a plant cell different from an animal cell?
ability to convert sunlight into energy
Which of the following protist moves by cytoplasmic streaming, surrounds food and engulfs it using pseudopods?
amoeba
Which of these is an organism that is unicellular?
amoeba
What does the diagram model?
an animal cell
Which of the following describes asexual reproduction?
binary fission in an amoeba
Which structures are common to both plant and animal cells?
cell membrane, nucleus, mitochondrion
A student draws a picture of an amoeba. What do an amoeba and a human have in common?
cells
The basic units of structure and function for both plants and animals are?
cells
An amoeba uses a sugar molecule during metabolic activity. It loses energy to the environment as a result. The transformation of energy from the sugar molecule to environmental energy can be described as a transformation between which of these?
chemical energy to thermal energy
Look at the diagram modeling some parts of a plant cell. Which organelle found in this cell is responsponsible for producing energy ?
chloroplast
The cells of a plant help the plant maintain its life functions. What part of a plant cell has the function of producing sugar in the presence of sunlight?
chloroplast
Which of these structures in a plant cell allows a plant to make food?
chloroplast
Oscar and Andre used a microscope to observe a sample of pond water and drew an example of each type of organism they saw. Then they compared their drawings. They discovered that their drawings of a euglena and a paramecium were alike, but their amoeba drawings had very different shapes. What are two things that Oscar's amoeba could have been doing that made his drawing look different from Andre's?
eating and moving
Which of the following protists moves by a flagellum, known for a unique feature-- an eye spot, some contain chlorophyll and are common in fresh water.
euglena
In which organism can cell walls be found?
grass
Which one of these is NOT a characteristic of an animal?
is multicellular with cells that have cell walls
Which characteristic does a volvox have that a euglena does not?
lives as one of a colony of cells
An athlete is running a race. The athlete's body needs energy. Which organelle(s) in the athlete's cells supply the energy for cellular functions?
mitochondrion
Which of these must be absorbed by animal cells in order to grow?
nutrients
A euglena has a flagellum and a paramecium has cilia. Both types of organelles help these organisms move through the water. However, a paramecium can also use its cilia to perform another task. What is this task?
obtain food
Pseudopods, flagellum and cilia are the structures in which protists like amoebas, paramecium, euglenas and volvox?
provide locomotion
Which characteristic can an amoeba change that a paramecium CANNOT change?
shape
Cells perform many different processes that an organism needs to survive and grow. Which is the MAIN function of the process of cellular respiration?
the release of energy
The human brain has an absolute requirement for glucose. Glucose is an absolute requirement because the brain cannot use any other sources of energy. Other organisms often have absolute requirements for specific energy sources. Which protist would you expect to have an absolute requirement for sunlight?
volvox
Which of the following protist is a colony of ciliates, some containing chlorophyll.
volvox
Which protist is a bi-flagellate autotroph?
volvox
Which two organisms contain chloroplasts and eyespots?
volvox and euglena
