Cells
This cell structure regulates what enters and leaves the cell.
What is the cell membrane?
The section of DNA that codes for a specific trait is called this.
What is a gene?
This scientist proposed natural selection as a mechanism for evolution.
Who is Charles Darwin?
The primary function of the respiratory system is the exchange of these two gases.
What are oxygen and carbon dioxide?
The original source of energy for nearly every ecosystem is this.
What is the Sun?
A cell placed in distilled water gains mass. The process responsible is this.
What is osmosis?
This trait is expressed only when an individual inherits two alleles that are not very common. The trait is described as this.
What is recessive?
Whale flippers, human arms, and bat wings provide evidence of this evolutionary concept.
What is common ancestry/homologous structures?
A rise in blood glucose levels triggers the release of this hormone.
What is insulin?
During photosynthesis, plants use carbon dioxide and water to produce glucose and this gas.
What is oxygen?
Muscle cells contain large numbers of these organelles because they require significant amounts of energy.
What are mitochondria?
A trait is expressed only when an individual inherits one alleles. The trait is described as this.
What is dominant?
A pesticide kills most insects, but a few survive and reproduce. After several generations the population becomes resistant. This process is known as what?
What is natural selection?
The circulatory and respiratory systems work together to deliver this substance to body cells.
What is oxygen?
If the population of rabbits in an ecosystem suddenly declines, the population most likely to decline next would be this type of organism.
What is a predator?
A student observes that molecules continue moving across a membrane until concentrations become equal on both sides. This state is called what?
What is equilibrium?
A mutation occurs in a skin cell and a mutation occurs in a sperm cell. Which mutation is more likely to affect future generations?
What is the mutation in the sperm cell?
A population of rabbits contains individuals with both light and dark fur. After several generations in a dark forest habitat, most rabbits have dark fur. Explain why.
What is dark-furred rabbits were better adapted and reproduced more successfully?
A student’s lab report shows that glucose levels in the blood increase rapidly after food is absorbed in the small intestine. Explain how glucose reaches body cells after absorption.
What is glucose enters the bloodstream in the small intestine and is transported by the circulatory system to cells?
Only about 10% of energy is transferred between trophic levels because most energy is lost as this.
What is heat?
A mutation damages ribosomes in a cell. Which cellular process would be directly affected?
What is protein synthesis?
A scientist discovers that a mutation changes one nucleotide in a gene, but the resulting protein is unaffected.
What is silent mutation?
Scientists discover that two species have nearly identical DNA but live in very different environments. What does the DNA evidence suggest?
What is the species share a recent common ancestor?
A bone marrow disorder reduces production of red blood cells. Explain how this affects the organism at the cellular level.
What is less oxygen is transported to cells, reducing cellular respiration and ATP production?
A lake ecosystem experiences a large increase in fertilizer runoff. Algal populations increase rapidly, followed by fish deaths. Explain why the fish die.
What is oxygen depletion due to algal blooms/decomposition?