Cells and Homeostasis
What is the basic unit of structure and function in living things?
What is a cell?
What do we call different forms of the same gene?
Alleles
What is the process by which organisms with advantageous traits are more likely to survive and reproduce? aka survival of the fittest
Natural Selection
What is the original source of energy for most ecosystems?
SUN
What gas do plants take in for photosynthesis?
Carbon dioxide
Which organelle is responsible for producing energy?
What is the mitochondria?
In a monohybrid cross, if two heterozygous parents are crossed, what is the probability of getting an offspring with the recessive trait?
25%
Which of the following is not a source of genetic variation: crossing over, mitosis, mutations, or independent assortment?
Mitosis
In an energy pyramid, why is the number of organisms smaller at the top?
BONUS 100pts: If there are 300,000,000kcal at the producer level, how many calories will be at the secondary consumer level?
only 10% of energy is transferred between levels
Bonus: 3,000,000 kcal
In which organelle does photosynthesis occur?
Chloroplast
What does selectively permeable mean in reference to the cell membrane?
What is allowing some substances to pass through while blocking others?
Which process is responsible for the creation of four genetically different gametes?
meiosis
Why does antibiotic resistance in bacteria support the theory of evolution?
What is it shows natural selection acting on genetic variation?
What is carrying capacity?
the maximum number of individuals an environment can support
What is the chemical equation for photosynthesis?
BONUS 100tpts: what's the chemical equation for cellular respiration?
6CO₂ + 6H₂O → C₆H₁₂O₆ + 6O₂
Bonus: O2+C6H1206--> CO2+H2O+ATP
Which feedback mechanism helps maintain homeostasis by reversing a change?
What is negative feedback?
What type of mutation results in a single base change in the DNA sequence?
Point mutation/ Base substitution
Describe two types of evidence that support the theory of evolution.
DNA, Fossils, Embryology, or Homologous structures
List two abiotic and two biotic limiting factors in an ecosystem.
water and temperature (abiotic), predators and food (biotic) other correct answers!
Which organisms carry out cellular respiration?
All living organisms
Give an example of a positive feedback loop AND a negative feedback loop.
Childbirth/blood clotting = Positive
Body Temp/blood sugar = Negative
Draw a dihybrid cross between two heterozygous individuals (AaBb x AaBb). What are the odds of a chlid being aabb?
1/16 or 6.25%
This mechanism of evolution creates new traits in a population with new DNA.
Mutation
How would the removal of a keystone species affect an ecosystem?
it could collapse or dramatically change the ecosystem's balance
How does the carbon cycle connect photosynthesis and respiration?
Photosynthesis removes CO₂, respiration returns it