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Science
8th
grade
Unit 1: Growth, Development, and Reproduction of Organisms
31 questions
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- 1. Multiple Choice
Which type of cell uses energy to carry out life processes?
plant cell, only
animal cell, only
both a plant cell and an animal cell
neither a plant cell nor an animal cell
- 2. Multiple ChoiceIn multicellular organisms, tissues are comprised of _______.organssystemscellsblood
- 3. Multiple ChoiceWhen tissues come together, they form ___________.cellsatomsorganssystems
- 4. Multiple ChoiceA(n) _________ is made of small parts connected together to make a whole.systemproblemevidenceillustration
- 5. Multiple Choice
Water and carbon dioxide are waste products released as a direct result of
asexual reproduction
mechanical digestion
natural selection
cellular respiration
- 6. Multiple Choice
The primary function of a plant’s roots is to
absorb water
perform photosynthesis
produce seeds
exchange gases
- 7. Multiple Choice
Genes are a part of a
cell wall
chromosome
hormone
vitamin
- 8. Multiple Choice
Compared to the amount of genetic information contained in a normal human body cell, the amount contained in a normal human sperm cell is
the same
twice as much
one-half as much
one-fourth as much
- 9. Multiple Choice
A change in an animal’s DNA, leading to a variation in a species, is called
a mutation
an infection
selective breeding
sexual reproduction
- 10. Multiple Choice
Which set of terms describes natural fertilization and development in humans before birth?
external fertilization, external development
external fertilization, internal development
internal fertilization, external development
internal fertilization, internal development
- 11. Multiple Choice
A plant growing toward a light source is an example of an organism
attracting a mate
destroying infectious germs
responding to external stimuli
obtaining moisture from the air
- 12. Multiple Choice
A cactus plant, a snake, and a hawk can be members of the same
community
kingdom
population
species
- 13. Multiple Choice
Which substance in green plants needs to absorb sunlight during photosynthesis?
chlorophyll
cytoplasm
oxygen
water
- 14. Multiple Choice
Cell division occurs as part of which process?
Energy in food is released.
A cut on a person’s finger heals.
A disinfectant destroys microbes.
The body eliminates wastes.
- 15. Multiple Choice
Which cell structure is found in plant cells, but not in animal cells?
cell wall
nucleus
cell membrane
cytoplasm
- 16. Multiple Choice
Amebas are single-celled organisms that need to obtain food in order to
release oxygen into the air
protect themselves from other living things
get the energy they need to carry out life functions
remove harmful chemicals from the environment
- 17. Multiple Choice
Which term identifies a group of cells of the same type working together to perform a common function?
microbe
tissue
gene
hormone
- 18. Multiple Choice
One function of the human excretory system is
making materials that the body cells need
moving substances to and from body cells
removing excess heat energy from the body
controlling the body’s responses to stimuli
- 19. Multiple Choice
Which term is used to describe the sum of all the chemical processes in the human body?
equilibrium
metamorphosis
inheritance
metabolism
- 20. Multiple Choice
Why is an organism that reproduces asexually genetically identical to its parent?
All of the offspring’s genes came from the parent.
All of the offspring’s genes mutated to look like the parent’s genes.
The offspring inherited only half of the parent’s genes.
The offspring inherited only the parent’s dominant genes.
- 21. Multiple Choice
How many chromosomes exist in a sex cell?
12
46
48
23
- 22. Multiple Choice
Abnormal cell division causes which health problem?
infection
aging
cancer
weight gain
- 23. Multiple Choice
Organisms are classified as producers or consumers according to the way they
obtain energy
release wastes
produce offspring
move from place to place
- 24. Multiple Choice
What causes infectious diseases in the human population?
allergic reactions
toxic chemicals
poor dietary habits
microorganisms
- 25. Multiple Choice
A Calorie is a unit used to measure
energy
density
vitamins
mass
- 26. Multiple Choice
A group of organs working together to perform a certain function is called
a system
water
a tissue
a cell
- 27. Multiple Choice
Which structure’s main function is to produce food (sugar) in a plant?
flower
root
leaf
seed
- 28. Multiple Choice
Which two human body systems work together to perform locomotion?
digestive and excretory systems
reproductive and circulatory systems
respiratory and endocrine systems
muscular and skeletal systems
- 29. Multiple Choice
An organism that contains chloroplasts is able to produce food by the process of
photosynthesis
respiration
reproduction
digestion
- 30. Multiple Choice
Which sequence lists the hereditary material found inside cells from the smallest unit to the largest unit?
chromosome → gene → nucleus
chromosome → nucleus → gene
gene → nucleus → chromosome
gene → chromosome → nucleus
- 31. Multiple Choice
Which human activity would help reduce the amount of carbon dioxide in the atmosphere?
Energy in food is released.
A cut on a person’s finger heals.
A disinfectant destroys microbes.
The body eliminates wastes.
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