Homeostasis & Physiology
The maintenance of a stable internal environment despite external changes.
Homeostasis
Microscopic infectious agents that can only reproduce inside host cells.
Virus
The variety of living organisms within an ecosystem.
Biodiversity
The scientist who proposed evolution by natural selection.
Charles Darwin
This molecule carries hereditary information in almost all living organisms.
DNA
This organ is the primary regulator of blood glucose levels through the secretion of insulin and glucagon.
Pancreas
White blood cells that produce antibodies.
B lymphocytes (B cells)
Organisms that obtain energy by breaking down dead organic matter.
Decomposers
The process by which individuals with advantageous traits are more likely to survive and reproduce.
Natural selection
The different forms of a gene that can occur at the same location.
Alleles
The type of feedback mechanism that counteracts a change and returns a variable toward its set point.
Negative Feedback
Immunity gained through vaccination is classified as this type of immunity.
artificial active immunity
The role an organism plays within an ecosystem, including how it obtains resources and interacts with other species.
Ecological Niche
Random changes in DNA sequences that provide new genetic variation.
Mutations
An organism with two different alleles for a particular gene is described by this term.
Heterozygote
When blood glucose levels rise after a meal, this hormone is released to lower them.
Insulin
Name 4 types of pathogens.
Viruses, bacteria, fungi, parasites, prions.
A species whose loss would cause disproportionately large changes to ecosystem structure and function.
Keystone Species
This evolutionary mechanism causes allele frequencies to change due to chance events, especially in small populations.
Genetic Drift
In a monohybrid cross between two heterozygous parents (Aa × Aa), this percentage of offspring is expected to be homozygous recessive.
25%
During dehydration, this hormone increases water reabsorption in the kidneys.
ADH
A vaccine introduces antigens that stimulate the formation of these long-lived cells responsible for a faster secondary immune response.
B cells (or memory lymphocytes)
How do you calculate net primary production?
Gross primary production - respiration = net primary production
A population of insects becomes resistant to an insecticide after repeated exposure over many generations. This is an example of this evolutionary process.
Natural Selection
A woman is a carrier for an X-linked recessive disorder and the father is unaffected. This proportion of sons is expected to inherit the disorder.
50%