Characteristics of Life
Characteristics of Life (cont)
Scientific Method
Microscopes
SURPRISE!
100
what is homeostasis?
the ability of an organism to maintain a constant internal environment when conditions outside are changing
100
Define assimilation
to make material a part of you
100
In an experiment, the independent variable:
A) does not change
B) shows relationships
C) is changed
D) is observed
C) is changed
100
what does the diaphragm control?
controls intensity and angle of light
100
Which life function is not necessary for an individual organism to stay alive?
A) nutrition
B) reproduction
C) regulation
D) excretion
B) reproduction
200
In which process are simple materials combined to form more complex materials?
A) Synthesis
B) Pinocytosis
C) Hydrolysis
D) Cyclosis
A) Synthesis
200
Every single-celled organism is able to survive because it carries out:
A) sexual reproduction
B) heterotrophic nutrition
C) autotrophic nutrition
D) metabolic activities
D) metabolic activities
200
The part of the experiment that does not contain the variable is known as the:
A) conclusion
B) data
C) control
D) experimental group
C) control
200
Draw what the letter e would look like under a microscope
(drawn upside down and reversed)
200
A cell in the field of view of a compound light microscope is shown in the diagram below.
In which direction should the slide be moved to center this cell in the microscopic field?
A) to the right and up
B) to the right and down
C) to the left and up
D) to the left and down
A) to the right and up
300
When a duck dives into cold water, the capillaries in its skin constrict and move deeper below the surface of the skin. This reaction is an example of:
A) Homeostasis
B) Synthesis
C) Respiration
D) Excretion
A) Homeostasis
300
A paramecium absorbs materials from its environment and circulates these materials throughout its cytoplasm. Which life function is described by these activities?
A) Synthesis
B) Reproduction
C) Respiration
D) Transport
D) Transport
300
Scientific claims should be questioned if:
A) peer review was used to examine the claims made by scientists
B) the experimental results cannot be repeated by other scientists
C) conclusions follow logically from the evidence
D) the data are based on samples that are very large
B) the experimental results cannot be repeated by other scientists
300
which objective would be better to use if scanning a slide to find an object?
low power objective
300
The diagram below shows how a coverslip should be lowered onto some single-celled organisms during the preparation of a wet mount.
Why is this a preferred procedure?
A) The coverslip will prevent the slide from breaking.
B) The organisms will be more evenly distributed.
C) The possibility of breaking the coverslip is reduced.
D) The possibility of trapping air bubbles is reduced.
D) The possibility of trapping air bubbles is reduced.
400
Which process is represented by the arrow below:
Energy stored in food --> energy available for use by living organisms
A) Growth
B) Respiration
C) Regulation
D) Excretion
B) respiration
400
A fruit fly is classified as a heterotroph, rather than as an autotroph because it is unable to:
A) transport needed materials through the body
B) release energy from organic molecules
C) manufacture its own food
D) divide its cells mitotically
C) manufacture its own food
400
A student set up an experiment to test the effect of the number of seedlings planted in one pot on the rate of growth. All conditions in the experiment were the same, except for the number of plants in each pot. The results are shown in the graph below.
The dependent variable for this experiment was
A) the number of plants per pot
B) time in days
C) average plant growth
D) the amount of water per pot
C) average plant growth
400
A student is viewing a plant stem cross section using a compound light microscope.
What parts of the microscope should the student use to bring the image into focus?
A) A and F
B) B and E
C) C and D
D) D and F
B) B and E
400
Which statement best illustrates the life process of growth?
A) A dog consumes a bowl of food.
B) An ameba moves away from bright light.
C) A bean seed germinates.
D) Two monosaccharides are formed from a disaccharide.
C) A bean seed germinates.
500
After eating a meal, blood sugar levels are elevated. The body secretes hormones to help absorb excess sugar into cells and return blood sugar levels to normal. This is an example of:
A) Excretion
B) Regulation
C) Synthesis
D) Reproduction
B) Regulation
500
Two organisms are presented below:
Which statement concerning organism A and organism B are correct?
A) Organism A contains tissues while organism B lacks tissues.
B) Organism A and organism B have the same organs.
C) Organism A and organism B have structures that allow them to maintain homeostasis.
D) Organism A lacks structures that maintain a dynamic equilibrium, while organism B has these structures.
C) Organism A and organism B have structures that allow them to maintain homeostasis
500
Which statement is an example of a hypothesis that can be tested through experimentation?
A) The number of times a dog wags its tail is a direct measure of how happy the dog is.
B) Is the ability of a fish to taste food affected by how clear the water is where it lives?
C) A plant's fear of herbivores increases as the plant grows older.
D) Bacterial growth will rapidly increase as the temperature increases.
D) Bacterial growth will rapidly increase as the temperature increases
500
Which activity might lead to damage of a microscope and specimen?
A) cleaning the ocular and objectives with lens paper
B) focusing with low power first before moving the high power into position
C) using the coarse adjustment to focus the specimen under high power
D) adjusting the diaphragm to obtain more light under high power
C) using the coarse adjustment to focus the specimen under high power
500
Changes in external temperatures often result in a person either sweating or shivering, as represented in the diagram below.
These responses are one way
A) to counteract feedback mechanisms that would otherwise be beneficial
B) to make the body release insulin to control blood circulation
C) the body is able to maintain dynamic equilibrium
D) skin and muscle cells are able to disrupt homeostasis
C) the body is able to maintain dynamic equilibrium