Biology Unit 9 Test Questions (the rest)
Which of these BEST illustrates natural selection?
An organism with favorable genetic variations will tend to survive and breed successfully
How do human diseases caused by bacteria and diseases caused by viruses react to antibodies?
Bacterial diseases respond to antibiotics; viral diseases do not
A small population of chimpanzees lives in a habitat that undergoes no changes for a long period. How will genetic drift probably affect this population?
It will reduce genetic diversity
Which of these secretes a hormone that regulates the rate of metabolism in your body?
Thyriod
Sweat and skin secretions contain a mixture of molecules that kills or limits the growth of many types of microbes. This control of microbes in an example
a nonspecific defense against infection
The fight or flight response includes greater heart output and a rise in blood pressure. This response is due to
adrenaline secreted by the adrenal glands
In carrier pigeons there is a rare inherited condition that causes the death of the chicks before hatching. In order for this disease to be passed from generation to generation there must be parent birds that
are heterozygous for the disease
Individuals with HIV sometimes contract a pneumonia infection that is rare in the rest of the population because people with HIV
are unable to fight off these pneumonia- causing organisms
The hemostatic mechanism in humans that regulates blood pH depends on the feed of information of
chemical receptors
Which of these would have LEAST effect on natural selection in a subspecies of giraffes that is geographically isolated from other subspecies of giraffes?
chromosome number
Carbon dioxide is produced as cells break down nutrients for enegry. Which of the following pairs of system would participate in removing the carbon dioxide from the body?
circulatory and respiratory
The respiratory system depends on the nervous system for signals to
coordinate muscles controlling breathing
Which of these organisms are MOST helpful in preventing Earth from being covered with the bodies of dead organisms?
fungi and bacteria
A small portion of a population that is geographically isolated from from the rest of the population runs the risk of decreased
genetic variation
Which of these organisms would MOST likely be found at the bottom of a biomass pyramid?
green algae
What is the greatest danger to a patient who has had damage to the skin?
infections in uncovered tissues
Mutations within a DNA sequence are
natural processes that produce genetic diversity
A healthy person is a carrier of a lethal allele but is unaffected by it. What is the probable genotype of this person?
one recessive lethal allele and one dominant normal allele
The Sabin vaccine is a liquid containing weakened polio viruses. Vaccinated individuals become protected against polio because the weakened viruses
promote production of antibodies
Striking the tendon just below the kneecap causes the lower leg to jerk. Moving an object quickly toward the face can cause the eyes to blink shut. These are examples of
reflex reactions
A signal that the bladder is full is sent to the central nervous system by
sensory neurons
Which of these organisms would MOST likely be found at the top of an energy pyramid?
sharks
Which of the following is a function of the nervous system?
signaling muscle tissues to contract
Injecting a person with a killed-bacteria vaccine can protect that individual from a disease because the proteins of the killed bacteria
stimulate the production of antibodies which can be manufactured later in response to infection
A single species of squirrel evolved over time into two species, each on opposite sides of the Grande Canyon. This chance was MOST likely due to
the isolation of the two groups
Which of the following require a host cell because they are NOT able to make proteins on their own?
viruses
In order for the body to maintain homeostatis, the chemical decomposition of food to produce energy must be followed by
waste removal
