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Ninth Grade (Grade 9) Biology Questions

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Grade 9 Biotic and Abiotic
Grade 9 Food Chains and Webs
Which of the following statements correctly describes an autotroph?
  1. It is an organism that makes its own food.
  2. It is an organism that eats other organisms.
  3. It is an organism that eats decaying matter.
  4. None of the above.
Grade 9 Cell Structure and Function
You are looking through a microscope at an unknown organism. The organism appears to have a cell membrane, as well as a cell wall. What conclusions can you make about what type of cell it is?
  1. The cell cannot be from a eukaryotic organism
  2. The cell can be from a prokaryotic or eukaryotic organism
  3. The cell can only be a prokaryotic organism
  4. The cell cannot be from a prokaryotic organism
Grade 9 Biotic and Abiotic
Which of these refers to the biotic factors of an ecosystem?
  1. The idea of two dissimilar organisms living together, as in mutualism, commensalism, amensalism, or parasitism.
  2. Any living part of an environment.
  3. A representation of the number of individual organisms in each trophic level of an ecosystem.
  4. An organism that eats only meat.
Grade 9 Biochemical Pathways
The process carried out by yeast that causes bread dough to rise is called
  1. alcoholic fermentation
  2. cellular respiration
  3. lactic acid fermentation
  4. mitosis
Grade 9 Cell Structure and Function
Grade 9 Cell Structure and Function
The fluid portion of the cytoplasm is called
  1. the nucleus
  2. the cytosol
  3. the hydrogen bond
  4. the molecule
Grade 9 Human Reproduction
What controls the start (onset) of puberty?
  1. Saliva Gland
  2. Thyroid Gland
  3. Pituitary Gland
  4. Adrenal Gland
Grade 9 Skin, Skeleton, and Muscles
What is a function of muscles?
  1. work in pairs to pull your lungs in different directions. They also help move food and blood through your body. Without them , you wouldn't be able to move at all
  2. work in pairs to pull your bones in different directions. They also help move food and blood through your body. Without them, you wouldn't be able to move at all
  3. take and absorb nutrients
  4. cleans your stomach
Grade 9 Macromolecules
Grade 9 Cell Structure and Function
Diffusion is an example of
  1. passive transport
  2. active transport
  3. membrane receptors
  4. transport proteins
Grade 9 Biochemical Pathways
What is the type of anaerobic respiration that humans perform?
  1. Diffusion
  2. Lactic Acid Fermentation
  3. Alcoholic Fermentation
  4. Aerobic Fermentation
Grade 9 Cell Structure and Function
A unicellular organism that does not have a nucleus and that has DNA freely floating in the cytoplasm is called
  1. an endoplasmic reticulum
  2. a prokaryotic cell
  3. a cytoplasm
  4. a eukaryotic cell
Grade 9 Cell Structure and Function
The difference in concentration from one area to another is called
  1. diffusion
  2. passive transport
  3. the concentration gradient
  4. facilitated diffusion
Grade 9 Cell Structure and Function
Grade 9 Communities, Populations, and Ecosystems
Which of these refers to a niche?
  1. An environmental factor that tends to limit population size
  2. An increase in the Earth's average atmospheric temperature that causes corresponding changes in climate, which may result from the greenhouse effect
  3. The unique living arrangement of an organism defined by its habitat, food sources, time of day that it is most active, and other factors
  4. None of the above
Grade 9 Biochemical Pathways
Which type of cellular respiration has Krebs Cycle as one of its steps?
  1. Anerobic Respiration
  2. Kreb Respiration
  3. Photosynthesis
  4. Aerobic Respiration
Grade 9 Biotic and Abiotic
Which of these describes the abiotic factors of an ecosystem?
  1. An umbrella term describing the complete process by which habitat loss results in the division of large, continuous habitats into a greater number of smaller patches of lower total area, isolated from each other by a matrix of dissimilar habitats, rather than just the patterns of spatial arrangement of the remaining habitat.
  2. A species that historically lived in one place, but that has been moved to a new geographic location, due to human interference.
  3. An environmental factor that tends to limit population size.
  4. The nonliving physical or chemical conditions of an environment.
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