更多"Biologists report that the biodiver"的相关试题:
[单项选择]Biologists report that the biodiversity is decreasing because ______.
A. more individual households are increasing greatly
B. human beings are threatening many wild creatures
C. human populations have been decreasing in recent years
D. wild creatures depend on more individual households
[单项选择]Charitable donations for the disadvantaged decreased because ______.
A. the U.S. economy has tumbled
B. more people donated for people affected by Sept. 11 attacks
C. more people stopped donating since they found the donations were misused
D. both A and B
[单项选择]The advance in ear's theory has made （） to decrease its price.
A. it possible
B. possible
C. it possibly
D. possibly
[单项选择]Many evolutionary biologists believe that
A. emotions do not exist.
B. emotions contribute to survival.
C. emotions serve no other purpose than giving meaning and depth to life.
D. only humans are capable of emotions.
[单项选择]Biologists have ascertained that specialized cells convert chemical energy into mechanical energy.
A. determined
B. argued
C. pretended
D. hypothesized
[单项选择]According to biologists, animal populations at a given time are _________ by food supplies at that time.
A. governed
B. sustained
C. mediated
D. manipulated
[单项选择]The jobs of wildlife technicians and biologists seemed ______to him ,but one day he discovered their difference.
A. identical
B. vertical
C. parallel
D. specific
[单项选择]Marine biologists are calling for Cardigan Bay to be redeveloped as a marine nature ______ to protect the dolphins.
A. reservation
B. rescue
C. reserve
D. refugee
[单项选择]The word "biodiversity" in the last paragraph means ______.
A. searching different sources of food supplies throughout the world
B. collecting various plant seeds, like vegetables, fruits, grains, flowers and herbs
C. the existence of a large variety of rare plants and animals in a given place at a given time
D. the existence of a wide range of different types of plants and animals in a given place at a given time
[单项选择]The author thinks that the biologists who engineer genes into plants ______ .
A. are nothing more than any other substances because they are made of molecule too
B. pay special attention to living things and their relation to their environment
C. insert the genes of one species among the genes of another and test the environment consequences
D. modify the genes of our food crops without considering the influence on the whole organism
[单项选择]Many biologists are critical of the film's ______premise that dinosaurs might one day return.
A. scientific
B. speculative
C. ambiguous
D. unwitting
