Biology Keystone Review 2

Often, organisms compete with each other for a food source. Which of the following pairs of organisms compete with each other for food?

• mice and rabbits
• squirrels and owls
• rabbits and green plants
• mice and owls

Original: ATC CAT
Mutation: ATC GCAT
What mutation occurred?

• deletion
• insertion
• silent
• transverse

produces sugar

• cellular respiration
• photosynthesis
• both

Which statement correctly describes how nitrogen in the soil returns to the atmosphere?

• Soil bacteria convert nitrates into nitrogen gas
• Decomposers directly convert ammonium into nitrogen gas
• Plants assimilate nitrites and convert them into nitrogen gas
• Nitrogen-fixing bacteria in plant roots convert nitrates into nitrogen gas

Which sequence correctly describes the flow of energy between organisms in the marine food web?

• from seals to penguins to krill
• from whales to krill to small fish
• from sea birds to seals to penguins
• from small fish to penguins to seals

The part of the enzyme that the substrate bonds to is called the _____.

• active site
• activation energy
• bond site
• peptide bond

A researcher observing an ecosystem describes the amount of sunlight, precipitation, and type of soil present. Which factors is the researcher most likely describing?

• biotic factors in a forest
• biotic factors in a tundra
• abiotic factors in a prairie
• abiotic factors in an ocean

R=round seed
r=wrinkled seed.
Cross a homozygous round with a wrinkled. Which statement predicts the results?

• offspring will be Rr
• offspring will be RR
• round seeds will be recessive to wrinkled
• Wrinkled will be observed in half of offspring

what are two types of passive transport?

• endo and exocytosis 
• cookies and milk
• active and passive 
• Osmosis and diffusion

Chromosome that is not a sex chromosome

• Chromosome
• Autosome
• Sex Chromosome
• Homologous pair