NEW
Font size
WorksheetsQuiz #2 for Quarter 3 (Ecology and Human Physio.)
Total questions: 12
Worksheet time: 12mins
Which of the following best explains the difference in the amount of available energy in the trophic levels of the desert ecosystem?
There is less energy available in the producers because their tissues are less dense
There is more energy available in the second trophic level because less energy is needed for hunting
There is more available energy in the birds of prey because they have greater muscle mass for storing energy
There is less available energy in the fourth trophic level because of the loss of energy through metabolism
The framework of organic molecules essential to all organisms is composed mainly of carbon atoms. Which processes are involved in the cycling of carbon within an environment?
photosynthesis and respiration
evaporation and condensation
transcription and translation
diffusion and transpiration
When an environment has reached its carrying capacity for a certain population, which of the following is true?
Growth and immigration rate is greater than death and emigration rate.
Growth and immigration rate is equal to death and emigration rate.
Growth and immigration rate is less than death and emigration rate.
Growth rate is exponential.
Data on the immigration and emigration of a fish species would be most helpful in determining which of the following?
biological magnification
interspecies competition
population of the species
predator-prey relationships
The presence of wastes, such as plastic bags and motor oil, in lakes and streams miles away from developed areas suggests that…
direct harvesting practices have led to irreversible destruction of ecosystems.
natural processes can alter ecosystem stability.
recycling programs have failed to conserve biotic resources.
ecosystems are interconnected and human action can alter ecosystem equilibrium.
The northern elephant seal was almost hunted to extinction in the 1800s. By the late 1890s, approximately one hundred seals were left, reducing the gene pool of the population. What will be the consequence of this reduction?
Competition within the population will increase.
The surviving elephant seals will be better able to adapt.
Inbreeding will be less frequent among the remaining population.
The elephant seals will be more vulnerable to environmental change.
The rate at which blood flows through the human body changes in response to many factors. Which statement describes one of these factors and its effect on blood flow?
A high viscosity of blood causes an increased resistance in the blood vessels and leads to slow blood flow.
A low blood pH decreases the rate of diffusion through the blood vessels and leads to slow blood flow.
The changing of the shape of red blood cells to a crescent shape decreases resistance and lead to a faster blood flow.
The narrowing of blood vessels increases pressure and leads to a faster blood flow.
Which of the following factors would most directly affect blood flow through the circulatory system?
blood pressure
blood sugar
respiratory rate
outside temperature
What is the body's first line of defense against infection by foreign organisms?
antibodies
lymph nodes
the skin
white blood cells
Vaccines can be used to prevent infections. Vaccinations tell the body to create "memory cells", which will function later to create antibodies against certain pathogens. When a person is vaccinated, what are they injected with?
antibodies to a disease bacterium
living viruses
weakened viruses or antigens from the virus
blood from a person who has had the disease
The p53 gene codes for the p53 protein that locates DNA errors for cellular repair. Which of the following statements best describes the relationships among possible environmental influences, the p53 gene, and cancer?
Increased levels of p53 protein, rather than environmental influences, can cause certain cancers.
Environmental influences can lead to mutations in the p53 gene, which can cause certain cancers.
Mutations in the p53 gene increase environmental influences that can cause certain cancers.
Genes such as p53 are less casual than environmental influences in stimulating certain cancers.
Mullet are local estuarine fish that move in schools and feed on plankton/plant matter. The graph below shows how the number of mullet in an area has changed over time. Which of the following is a likely explanation for the change in the mullet population?
mullet prey increased in the area
mullet parasites decreased in the area
the amount of aquatic plants in the area decreased
the temperature of the area increased
